| 3 Months | 1 Year | 3 Years | 5 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2004 - 2005) | (Tx 2004 - 2005) | (Tx 2002 - 2005) | (Tx 2000 - 2005) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 761 | 85.9% | 1.3% | 761 | 78.5% | 1.5% | 1,479 | 66.1% | 1.4% | 2,082 | 58.1% | 1.4% |
| Yearly Center Volume | 0-4 | 70 | 78.6% | 4.9% | 70 | 73.9% | 5.3% | 151 | 57.2% | 4.6% | 227 | 51.8% | 4.3% |
| 5-7 | 120 | 84.9% | 3.3% | 120 | 77.8% | 3.9% | 193 | 66.3% | 3.7% | 254 | 63.4% | 3.7% | |
| 8-11 | 64 | 84.4% | 4.5% | 64 | 74.6% | 5.5% | 248 | 68.4% | 3.5% | 333 | 55.2% | 3.6% | |
| 12-19 | 172 | 87.2% | 2.5% | 172 | 78.8% | 3.1% | 305 | 65.2% | 3.2% | 453 | 59.4% | 3.3% | |
| 20+ | 335 | 87.5% | 1.8% | 335 | 80.3% | 2.2% | 582 | 67.7% | 2.3% | 815 | 59.5% | 2.2% | |