| 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 | 719 | 87.0% | 1.3% | 719 | 77.6% | 1.6% | 1,328 | 66.1% | 1.5% | 1,706 | 56.7% | 1.8% |
| Yearly Center Volume | 0-4 | 51 | 82.4% | 5.3% | 51 | 62.3% | 6.9% | 125 | 58.3% | 5.1% | 183 | 45.7% | 7.6% |
| 5-7 | 114 | 81.6% | 3.6% | 114 | 76.1% | 4.0% | 168 | 67.4% | 4.1% | 152 | 64.1% | 5.0% | |
| 8-11 | 104 | 90.4% | 2.9% | 104 | 74.5% | 4.4% | 177 | 69.5% | 4.3% | 273 | 54.6% | 5.4% | |
| 12-19 | 170 | 87.6% | 2.5% | 170 | 80.9% | 3.0% | 250 | 61.0% | 3.8% | 295 | 59.6% | 3.9% | |
| 20+ | 280 | 88.5% | 1.9% | 280 | 80.2% | 2.4% | 608 | 68.7% | 2.2% | 803 | 57.7% | 2.4% | |