Year | Annual |
1990 | 55.47 |
1993 | 74.905 |
1996 | 57.26 |
1999 | 57.76 |
2002 | 56.365 |
2005 | 50.9875 |
2008 | 47.595 |
2011 | 46.3925 |
2014 | 57.62909 |
2017 | 69.82409 |