| 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 | 664 | 93.5% | 1.0% | 664 | 87.7% | 1.3% | 1,554 | 80.2% | 1.1% | 1,874 | 77.4% | 1.2% |
| Yearly Center Volume | 0-9 | 17 | 82.4% | 9.2% | 17 | 82.4% | 9.2% | 47 | 78.7% | 6.0% | 75 | 75.8% | 7.7% |
| 10-19 | 44 | 86.4% | 5.2% | 44 | 79.5% | 6.1% | 67 | 82.6% | 4.8% | 68 | 81.4% | 4.9% | |
| 20-34 | 34 | 97.1% | 2.9% | 34 | 88.2% | 5.5% | 118 | 80.8% | 3.8% | 224 | 75.5% | 3.2% | |
| 35-56 | 157 | 92.4% | 2.1% | 157 | 84.7% | 2.9% | 357 | 77.2% | 2.4% | 507 | 77.0% | 2.3% | |
| 57+ | 412 | 94.9% | 1.1% | 412 | 89.8% | 1.5% | 965 | 81.2% | 1.4% | 1,000 | 78.1% | 1.5% | |