| 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 | 2,032 | 91.2% | 0.6% | 2,032 | 83.0% | 0.8% | 3,962 | 64.5% | 0.9% | 5,620 | 49.3% | 0.9% |
| Yearly Center Volume | 0-3 | 65 | 92.3% | 3.3% | 65 | 72.3% | 5.6% | 130 | 63.5% | 4.6% | 246 | 46.9% | 3.7% |
| 4-6 | 53 | 90.6% | 4.0% | 53 | 83.0% | 5.2% | 157 | 51.2% | 4.7% | 258 | 47.5% | 3.7% | |
| 7-11 | 123 | 86.2% | 3.1% | 123 | 78.0% | 3.7% | 350 | 56.6% | 3.0% | 455 | 35.9% | 3.5% | |
| 12-20 | 561 | 89.5% | 1.3% | 561 | 78.8% | 1.7% | 991 | 60.0% | 1.9% | 1,528 | 44.4% | 1.8% | |
| 21+ | 1,230 | 92.4% | 0.8% | 1,230 | 85.9% | 1.0% | 2,334 | 68.5% | 1.1% | 3,133 | 53.8% | 1.3% | |