Possibly inconsistent JSON formatting returned by API calls to the IIP data set

All other JSON output returned by the BEA API includes "DATA" as a key of the "RESULTS" JSON object. Here that doesn't seem to be the case.

```json
{"BEAAPI":{"Request":{"RequestParam":[{"ParameterName":"YEAR","ParameterValue":"ALL"},{"ParameterName":"FREQUENCY","ParameterValue":"A"},{"ParameterName":"COMPONENT","ParameterValue":"CHGPOSPRICE"},{"ParameterName":"DATASETNAME","ParameterValue":"IIP"},{"ParameterName":"RESULTFORMAT","ParameterValue":"JSON"},{"ParameterName":"METHOD","ParameterValue":"GETDATA"},{"ParameterName":"USERID","ParameterValue":"98A0A0A7-21DF-4B75-96DE-1410D47AB280"},{"ParameterName":"TYPEOFINVESTMENT","ParameterValue":"FINASSETSEXCLFINDERIV"}]},"Results":{"Dimensions":[{"Ordinal":"1","Name":"TypeOfInvestment","DataType":"string","IsValue":"0"},{"Ordinal":"2","Name":"Component","DataType":"string","IsValue":"0"},{"Ordinal":"4","Name":"Frequency","DataType":"string","IsValue":"0"},{"Ordinal":"5","Name":"Year","DataType":"string","IsValue":"0"},{"Ordinal":"6","Name":"TimeSeriesId","DataType":"string","IsValue":"0"},{"Ordinal":"7","Name":"TimeSeriesDescription","DataType":"string","IsValue":"0"},{"Ordinal":"8","Name":"TimePeriod","DataType":"string","IsValue":"0"},{"Ordinal":"9","Name":"CL_UNIT","DataType":"string","IsValue":"0"},{"Ordinal":"10","Name":"UNIT_MULT","DataType":"string","IsValue":"0"},{"Ordinal":"11","Name":"DataValue","DataType":"numeric","IsValue":"1"}]},"Data":[{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2003","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2003","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"767451","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2004","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2004","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"468623","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2005","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2005","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"1079110","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2006","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2006","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"1111577","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2007","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2007","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"559376","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2008","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2008","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"-4329718","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2009","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2009","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"1869617","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2010","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2010","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"891472","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2011","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2011","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"-1259746","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2012","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2012","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"1176447","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2013","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2013","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"1694780","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2014","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2014","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"654662","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2015","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2015","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"193414","NoteRef":""},{"TypeOfInvestment":"FinAssetsExclFinDeriv","Component":"ChgPosPrice","Frequency":"A","Year":"2016","TimeSeriesId":"TSI_IipFinAssetsExclFinDerivChgPosPrice_A","TimeSeriesDescription":"U.S. assets excluding financial derivatives (Change in position attributable to price changes); annual","TimePeriod":"2016","CL_UNIT":"USD","UNIT_MULT":"6","DataValue":"833675","NoteRef":""}]}}
```