| 3 Months | 1 Year | 3 Years | 5 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2002 - 2003) | (Tx 2002 - 2003) | (Tx 2000 - 2003) | (Tx 1998 - 2003) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 1,767 | 89.1% | 0.7% | 1,767 | 85.8% | 0.8% | 3,560 | 78.9% | 0.8% | 5,458 | 71.0% | 0.8% |
| Yearly Center Volume | 0-3 | 124 | 87.0% | 3.0% | 124 | 82.6% | 3.5% | 296 | 78.1% | 2.6% | 448 | 69.5% | 2.9% |
| 4-6 | 178 | 84.3% | 2.7% | 178 | 80.2% | 3.0% | 407 | 72.8% | 2.6% | 583 | 68.2% | 2.2% | |
| 7-10 | 239 | 89.5% | 2.0% | 239 | 87.8% | 2.1% | 388 | 74.8% | 2.6% | 781 | 69.2% | 2.0% | |
| 11-17 | 366 | 88.8% | 1.6% | 366 | 85.4% | 1.9% | 950 | 81.8% | 1.4% | 1,454 | 71.5% | 1.7% | |
| 18+ | 860 | 90.5% | 1.0% | 860 | 87.0% | 1.2% | 1,519 | 80.0% | 1.1% | 2,192 | 72.3% | 1.2% | |