Total | Improvement | Age | ||
Non-improv | Good | Very good | ||
61 | 14 | 12 | 35 | 1 - 29 |
48 | 11 | 18 | 19 | 30 - 59 |
43 | 16 | 15 | 12 | <60 |
152 | 41 | 45 | 66 | Total |