Year
|
January
|
February
|
March
|
September
|
March trend
|
September trend
|
1979
|
15.84
|
16.57
|
16.85
|
8
|
16.54
|
8.7
|
1980
|
15.59
|
16.46
|
16.51
|
8.75
|
16.5
|
8.61
|
1981
|
15.43
|
16.08
|
16.14
|
8.17
|
16.45
|
8.52
|
1982
|
15.72
|
16.46
|
16.53
|
8.25
|
16.41
|
8.43
|
1983
|
15.45
|
16.42
|
16.53
|
8.45
|
16.37
|
8.34
|
1984
|
14.91
|
15.67
|
15.98
|
7.88
|
16.33
|
8.25
|
1985
|
15.11
|
15.83
|
16.32
|
7.8
|
16.29
|
8.16
|
1986
|
15.27
|
16.21
|
16.3
|
8.15
|
16.25
|
8.06
|
1987
|
15.51
|
16.45
|
16.17
|
8.15
|
16.2
|
7.97
|
1988
|
15.58
|
16
|
16.35
|
8.16
|
16.16
|
7.88
|
1989
|
15.22
|
15.89
|
15.86
|
7.75
|
16.12
|
7.79
|
1990
|
15.14
|
16
|
16.34
|
6.94
|
16.08
|
7.7
|
1991
|
14.79
|
15.65
|
15.8
|
7.24
|
16.04
|
7.61
|
1992
|
15.3
|
15.97
|
16.04
|
8.24
|
15.99
|
7.52
|
1993
|
15.46
|
16.14
|
16.22
|
7.32
|
15.95
|
7.43
|
1994
|
15.19
|
16.02
|
15.97
|
8.02
|
15.91
|
7.34
|
1995
|
15.06
|
15.64
|
15.66
|
6.82
|
15.87
|
7.24
|
1996
|
14.61
|
15.55
|
15.53
|
8.42
|
15.83
|
7.15
|
1997
|
14.97
|
15.86
|
15.9
|
7.42
|
15.79
|
7.06
|
1998
|
15.12
|
16.1
|
16.02
|
7.5
|
15.74
|
6.97
|
1999
|
14.84
|
15.66
|
15.71
|
7.18
|
15.7
|
6.88
|
2000
|
14.72
|
15.61
|
15.64
|
7.28
|
15.66
|
6.79
|
2001
|
14.76
|
15.68
|
15.85
|
7.59
|
15.62
|
6.7
|
2002
|
14.89
|
15.77
|
15.75
|
6.59
|
15.58
|
6.61
|
2003
|
14.78
|
15.55
|
15.84
|
6.89
|
15.53
|
6.52
|
2004
|
14.43
|
15.27
|
15.31
|
6.64
|
15.49
|
6.42
|
2005
|
14.04
|
14.77
|
15.04
|
6.19
|
15.45
|
6.33
|
2006
|
13.91
|
14.67
|
14.77
|
6.56
|
15.41
|
6.24
|
2007
|
14.14
|
14.91
|
14.91
|
4.96
|
15.37
|
6.15
|
2008
|
14.24
|
15.27
|
15.44
|
5.39
|
15.33
|
6.06
|
2009
|
14.22
|
15.06
|
15.26
|
5.89
|
15.28
|
5.97
|
2010
|
13.97
|
14.88
|
15.41
|
5.55
|
15.24
|
5.88
|
2011
|
13.79
|
14.63
|
14.87
|
5.12
|
15.2
|
5.79
|
2012
|
14.04
|
14.9
|
15.47
|
4.15
|
15.16
|
5.69
|
2013
|
|
|
15.43
|
6.16
|
15.12
|
5.6
|
2014
|
|
|
15.33
|
6.3
|
15.07
|
5.51
|