LineChartView with multi lines display issue

Here is sample for 10 lines in LineChartView.

The problem is just showing top 5 or 6 lines . How can all 10 lines fix in small chart?
```
let list = [[10, 10,10,10,10,10],
[9, 9,9,9,9,9],
[8, 8,8,8,8,8],
[7, 7,7,7,7,7],
[6, 6,6,6,6,6],
[5, 5,5,5,5,5],
[4, 4,4,4,4,4],
[3, 3,3,3,3,3],
[2, 2,2,2,2,2],
[1, 1,1,1,1,1]
]
var dataSets = [ LineChartDataSet]()
for index in 0..