| Blood Type | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 1,525 | 1,435 | 1,507 | 1,609 | 1,651 | 1,628 | 1,581 | 1,576 | 1,446 | 1,251 |
| A | 543 | 495 | 516 | 528 | 555 | 549 | 541 | 519 | 453 | 406 |
| AB | 47 | 40 | 39 | 45 | 40 | 33 | 33 | 33 | 38 | 32 |
| B | 188 | 175 | 171 | 188 | 188 | 175 | 183 | 172 | 165 | 136 |
| O | 747 | 725 | 781 | 848 | 868 | 871 | 824 | 852 | 790 | 677 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| A | 35.6% | 34.5% | 34.2% | 32.8% | 33.6% | 33.7% | 34.2% | 32.9% | 31.3% | 32.5% |
| AB | 3.1% | 2.8% | 2.6% | 2.8% | 2.4% | 2.0% | 2.1% | 2.1% | 2.6% | 2.6% |
| B | 12.3% | 12.2% | 11.3% | 11.7% | 11.4% | 10.7% | 11.6% | 10.9% | 11.4% | 10.9% |
| O | 49.0% | 50.5% | 51.8% | 52.7% | 52.6% | 53.5% | 52.1% | 54.1% | 54.6% | 54.1% |