| Year | Races Run | Actual Starters | Total Runners | Avg. Starts per Horse |
Avg. Runners per Race |
| 2019 | 127 | 503 | 1,568 | 3.1 | 12.3 |
| 2018 | 126 | 504 | 1,564 | 3.1 | 12.4 |
| 2017 | 126 | 497 | 1,563 | 3.1 | 12.4 |
| 2016 | 128 | 505 | 1,579 | 3.1 | 12.3 |
| 2015 | 128 | 509 | 1,582 | 3.1 | 12.4 |
| 2014 | 125 | 507 | 1,584 | 3.1 | 12.7 |
| 2013 | 130 | 533 | 1,608 | 3.0 | 12.4 |
| 2012 | 133 | 552 | 1,682 | 3.0 | 12.6 |
| 2011 | 122 | 562 | 1,578 | 2.8 | 12.9 |
| 2010 | 134 | 586 | 1,754 | 3.0 | 13.1 |
| 2009 | 134 | 578 | 1,769 | 3.1 | 13.2 |
| 2008 | 132 | 581 | 1,759 | 3.0 | 13.3 |
| 2007 | 132 | 564 | 1,766 | 3.1 | 13.4 |
| 2006 | 133 | 534 | 1,789 | 3.4 | 13.5 |
| 2005 | 133 | 523 | 1,701 | 3.3 | 12.8 |
| 2004 | 135 | 532 | 1,729 | 3.3 | 12.8 |
| 2003 | 133 | 483 | 1,740 | 3.6 | 13.1 |
| 2002 | 133 | 492 | 1,676 | 3.4 | 12.6 |
| 2001 | 133 | 447 | 1,595 | 3.6 | 12.0 |
| 2000 | 135 | 424 | 1,464 | 3.5 | 10.8 |
| 1999 | 138 | 413 | 1,525 | 3.7 | 11.1 |
| 1998 | 130 | 329 | 1,231 | 3.7 | 9.5 |
| 1997 | 129 | 304 | 1,101 | 3.6 | 8.5 |
| 1996 | 132 | 325 | 1,138 | 3.5 | 8.6 |
| 1995 | 131 | 323 | 1,219 | 3.8 | 9.3 |
| 1994 | 133 | 333 | 1,205 | 3.6 | 9.1 |
| 1993 | 140 | 316 | 1,174 | 3.7 | 8.4 |
| 1992 | 144 | 307 | 1,246 | 4.1 | 8.7 |
| 1991 | 146 | 323 | 1,213 | 3.8 | 8.3 |
| 1990 | 153 | 334 | 1,294 | 3.9 | 8.5 |