| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
2006 | - | 998.1( 21) | 976.9( 90) | 988.1( 93) | 984.8( 87) | 993.0( 83) | 988.6( 87) | 995.8(100) | 986.8( 90) | 985.6( 90) | 977.2( 97) | 980.4( 84) |
2007 | 980.4( 42) | - | - | - | - | - | - | - | - | - | - | - |
2008 | - | - | - | - | - | - | - | - | - | - | - | - |
2009 | - | - | - | - | - | - | - | - | - | - | - | - |