Caffeine and Alcoholic Beverages

Caffeine,Before,After
Yes,11.83,18.30
Yes,11.16,17.80
Yes,11.94,19.00
Yes,12.04,19.01
Yes,12.14,19.20
Yes,12.61,18.70
Yes,12.07,18.55
Yes,12.16,18.20
No,12.02,19.79
No,11.14,17.40
No,11.10,17.90
No,11.89,16.60
No,12.09,17.50
No,11.93,19.00
No,12.16,18.60
No,12.64,20.00