1 = Berlin | 2 = Hamburg | 3 = Leipzig | 4 = Cologne | 5 = Munich
A = excellent | B = good | C = moderate | D = restricted | E = pathological
0 = pre-primary | 1 = primary | 2 = secondary | 3 = uppersecond | 4 = postsecond | 5 = tertiary | 6 = secondtertiary
0 = never | 1 = 1-2d a week |  2 = 3-4d a week | 3 = 5-6d a week | 4 = daily