Baseline | 6 month | 6 month change | 12 month | 12 month change | 18 month | 18 month change | 24 month | 24 month change | |
1 or fewer | 7.1 | 6.8 | -0.3 | 6.6 | -0.6 | 6.5 | -0.6 | 6.3 | -0.8 |
2 to 3 | 8.9 | 7.2 | -1.7 | 6.7 | -2.2 | 7.3 | -1.6 | 6.4 | -2.5 |
4+ | 6.3 | 6.2 | -0.1 | 6.2 | -0.1 | 6.2 | -0.1 | 6.4 | 0.0 |