Table 3.
1996 | 1997 | 1998 | |
Lower income | 28.4 | 32.6 | 32.1 |
Middle income | 20.2 | 21.8 | 21.0 |
Upper income | 16.7 | 17.4 | 15.4 |
Rates are per 100 children per year
1996 | 1997 | 1998 | |
Lower income | 28.4 | 32.6 | 32.1 |
Middle income | 20.2 | 21.8 | 21.0 |
Upper income | 16.7 | 17.4 | 15.4 |
Rates are per 100 children per year