| 3 Months | 1 Year | 5 Years | 10 Years | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (Tx 2006 - 2007) | (Tx 2006 - 2007) | (Tx 2002 - 2007) | (Tx 1997 - 2007) | ||||||||||
| N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | N | % | Std. Err. | ||
| Total | All | 1,731 | 97.9% | 0.3% | 1,731 | 95.7% | 0.5% | 5,233 | 87.2% | 0.6% | 9,723 | 71.4% | 0.7% |
| Yearly Center Volume | 0-3 | 212 | 97.2% | 1.1% | 212 | 95.8% | 1.4% | 752 | 87.3% | 1.5% | 1,323 | 69.8% | 2.3% |
| 4-6 | 327 | 99.4% | 0.4% | 327 | 96.6% | 1.0% | 955 | 86.7% | 1.5% | 1,843 | 73.1% | 1.5% | |
| 7-9 | 252 | 97.2% | 1.0% | 252 | 95.2% | 1.3% | 463 | 86.3% | 2.0% | 1,586 | 74.1% | 1.8% | |
| 10-16 | 354 | 97.2% | 0.9% | 354 | 94.9% | 1.2% | 1,493 | 88.3% | 1.1% | 2,333 | 69.9% | 1.6% | |
| 17+ | 586 | 98.0% | 0.6% | 586 | 95.7% | 0.8% | 1,570 | 86.9% | 1.1% | 2,638 | 70.5% | 1.3% | |