| 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 | 17,700 | 98.1% | 0.1% | 17,700 | 95.6% | 0.2% | 48,242 | 81.9% | 0.2% | 82,204 | 61.2% | 0.3% |
| Yearly Center Volume | 0-12 | 305 | 99.3% | 0.5% | 305 | 97.7% | 0.9% | 840 | 86.8% | 1.6% | 2,063 | 66.3% | 1.6% |
| 13-28 | 1,009 | 97.7% | 0.5% | 1,009 | 95.6% | 0.6% | 3,131 | 80.8% | 1.0% | 6,158 | 62.8% | 1.0% | |
| 29-47 | 1,876 | 97.8% | 0.3% | 1,876 | 94.4% | 0.5% | 5,375 | 80.8% | 0.7% | 11,244 | 61.9% | 0.8% | |
| 48-81 | 3,073 | 98.6% | 0.2% | 3,073 | 96.1% | 0.4% | 10,387 | 81.9% | 0.5% | 17,877 | 59.4% | 0.6% | |
| 82+ | 11,437 | 98.1% | 0.1% | 11,437 | 95.6% | 0.2% | 28,509 | 82.1% | 0.3% | 44,862 | 61.3% | 0.4% | |