(Per cent per annum)
Year / Month
1-month
3-month
6-month
1
2
3
4
2009
2011
Apr
3.77
3.34
2.82
Jun
6.65
6.67
6.40
May
3.64
3.42
2.89
Jul
6.96
6.63
6.39
3.46
3.29
2.86
Aug
3.58
4.07
3.88
2.69
2.57
2.43
Sep
4.64
4.35
3.41
2.98
2.80
Oct
5.92
4.95
3.83
2.61
2.66
2.72
Nov
6.74
5.20
4.24
2.68
2.93
3.20
Dec
8.04
6.64
5.96
2.25
2.46
2.73
2012
2.67
2.51
2.83
Jan
8.89
7.81
6.80
2010
Feb
8.94
8.31
7.18
2.84
Mar
10.09
8.55
7.40
2.18
2.78
8.58
7.73
7.05
3.44
3.28
3.10
7.93
7.22
6.35
3.47
3.43
3.39
7.48
6.87
5.90
2.88
2.60
7.21
6.52
4.40
3.72
3.22
7.84
7.37
6.86
5.26
4.73
4.12
7.41
6.90
6.51
5.69
5.38
4.86
7.54
6.78
6.33
6.00
5.75
5.36
7.04
6.42
6.06
7.85
6.94
6.50
7.53
6.57
5.95
2013
6.59
6.34
7.43
7.17
6.71
7.76
7.24
6.79
6.41
8.79
7.87
7.27
6.66
7.74
7.50
8.03
7.31
6.89
7.42
7.38
6.77
6.68
6.54
8.36
7.83
7.47
Note : Market-based exchange rate system was introduced from March 1, 1993.