| Year | June | July | August | | 1988 | 17.13 | 17.02 | 16.67 | | 1989 | 15.07 | 17.20 | 16.07 | | 1990 | 15.19 | 16.74 | 17.24 | | 1991 | 12.73 | 16.96 | 17.92 | | 1992 | 16.38 | 16.57 | 16.33 | | 1993 | 14.32 | 14.02 | 15.17 | | 1994 | 12.16 | 17.45 | 19.19 | | 1995 | 14.20 | 15.90 | 19.03 | | 1996 | 12.71 | 14.25 | 17.26 | | 1997 | 15.94 | 19.43 | 20.78 | | 1998 | 13.63 | 15.21 | 15.97 | | 1999 | 14.18 | 16.62 | 18.60 | | 2000 | 13.77 | 16.96 | 16.63 | | 2001 | 13.84 | 17.10 | 17.31 | | 2002 | 15.24 | 17.19 | 20.87 | | 2003 | 14.92 | 18.29 | 18.54 | | 2004 | 13.78 | 15.54 | 18.79 | | 2005 | 14.08 | 18.15 | 17.55 | | 2006 | 14.21 | 18.86 | 19.91 | | 2007 | 16.02 | 16.15 | 17.36 | | 2008 | 14.77 | 17.47 | 17.99 | | 2009 | 15.04 | 17.78 | 17.27 | |
|
| Last 10 years | 14.40 | 16.83 | 18.03 | | Last 30 years | 14.06 | 16.48 | 17.26 |
Go back
|