| 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 | 532 | 94.9% | 1.0% | 532 | 91.0% | 1.2% | 1,821 | 79.0% | 1.1% | 3,126 | 69.9% | 1.2% |
| Yearly Center Volume | 0-9 | 10 | 90.0% | 9.5% | 10 | 90.0% | 9.5% | 41 | 70.2% | 7.8% | 123 | 75.2% | 4.6% |
| 10-19 | 17 | 88.2% | 7.8% | 17 | 88.2% | 7.8% | 124 | 82.4% | 4.1% | 114 | 74.7% | 6.0% | |
| 20-34 | 33 | 100.0% | 0.0% | 33 | 97.0% | 3.0% | 83 | 72.4% | 6.4% | 277 | 72.3% | 2.9% | |
| 35-56 | 145 | 93.1% | 2.1% | 145 | 89.7% | 2.5% | 417 | 82.9% | 2.2% | 902 | 71.7% | 2.3% | |
| 57+ | 327 | 95.7% | 1.1% | 327 | 91.1% | 1.6% | 1,156 | 78.3% | 1.4% | 1,710 | 67.4% | 1.9% | |