TARGET-ACTUAL chart with analytics

I would like to create a graph, x-axis the year+calendar week
Y1-axis the target value, Y2-axis the actual value.

How can I realise this?

What should the csv file for this look like?

This is what it looks like so far (csv):

YEAR_KW SOLL IST
25_01 5 3
25_02 10 7
25_03 15 11
25_04 20 15
25_05 25 20
25_06 30 22
25_07 35 26
25_08 40 30
25_09 45 34
25_10 50 39
25_11 55 43
25_12 60 49
25_13 65 55
25_14 70 62
25_15 75 65

Thank you for your support!