| 1997 | 8651.1 | 14,790.181 | 2011 | 103,874.4 | 97,424.230 |
| 1998 | 9876.0 | 15,713.670 | 2012 | 117,253.5 | 111,143.228 |
| 1999 | 11,444.1 | 16,156.034 | 2013 | 129,209.6 | 125,294.884 |
| 2000 | 13,395.2 | 17,126.316 | 2014 | 140,370.0 | 137,518.197 |
| 2001 | 16,386.0 | 18,754.307 | 2015 | 152,269.2 | 146,709.549 |
| 2002 | 18,903.6 | 20,607.325 | 2016 | 159,605.0 | 157,621.870 |
| 2003 | 21,715.3 | 22,890.646 | 2017 | 172,592.8 | 170,235.019 |
| 2004 | 26,396.5 | 28,867.003 | 2018 | 183,359.8 | 181,818.079 |
| 2005 | 31,649.3 | 32,567.917 | 2019 | 190,390.1 | 196,831.631 |
| 2006 | 38,760.2 | 37,531.066 | 2020 | NA | 237,477.637 |
| 2007 | 51,321.8 | 46,894.896 | 2021 | NA | 244,818.212 |