| 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 | 1,750 | 97.7% | 0.4% | 1,750 | 95.3% | 0.5% | 3,525 | 90.6% | 0.6% | 5,406 | 85.9% | 0.6% |
| Yearly Center Volume | 0-3 | 225 | 97.8% | 1.0% | 225 | 94.7% | 1.5% | 475 | 91.1% | 1.5% | 657 | 86.5% | 1.7% |
| 4-6 | 257 | 96.9% | 1.1% | 257 | 94.2% | 1.5% | 464 | 90.1% | 1.6% | 923 | 85.8% | 1.4% | |
| 7-9 | 145 | 97.2% | 1.4% | 145 | 95.9% | 1.7% | 390 | 86.0% | 2.1% | 597 | 83.3% | 1.8% | |
| 10-16 | 582 | 97.8% | 0.6% | 582 | 95.5% | 0.9% | 994 | 92.7% | 0.9% | 1,438 | 86.9% | 1.2% | |
| 17+ | 541 | 98.0% | 0.6% | 541 | 95.7% | 0.9% | 1,202 | 90.4% | 1.0% | 1,791 | 85.8% | 1.0% | |