stacked bar chart

Hey Curran,

Thanks for the sreencasts, I was very helpful.
I made the stacked bar chart and it works ok, if there is no missing data.
In your csv file" religionByCountryTop5.csv" for example Brazil Hindu is marked zero.
In my case the combination of Brazil Hindu would not be in the file.
How can adjust the code to work if data is missing, I plug the chart on oracle BI, so I don't know in advance if data is going to be missing.

Thanks,