(Per cent per annum)
Year / Month
1-month
3-month
6-month
1
2
3
4
2008
2010
Apr
3.00
2.68
2.38
Jun
4.40
3.72
3.22
May
3.29
2.45
1.85
Jul
5.26
4.73
4.12
4.37
3.69
3.15
Aug
5.69
5.38
4.86
7.54
6.04
4.92
Sep
6.00
5.75
5.36
5.48
4.71
3.84
Oct
7.85
6.94
6.50
2.95
2.35
1.98
Nov
7.18
5.95
2.48
1.13
0.70
Dec
7.05
6.59
6.34
6.78
4.20
2.66
2011
5.78
4.59
Jan
6.79
6.41
2009
Feb
6.33
6.66
6.35
4.06
3.10
Mar
8.03
7.31
6.89
3.20
2.12
7.42
7.48
7.38
5.22
3.99
6.77
6.68
6.54
3.77
3.34
2.82
6.65
6.67
6.40
3.64
3.42
2.89
6.96
6.63
6.39
3.46
2.86
3.58
4.07
3.88
2.69
2.57
2.43
4.64
4.35
3.41
2.98
2.80
5.92
4.95
3.83
2.61
2.72
6.74
5.20
4.24
2.93
8.04
6.64
5.96
2.25
2.46
2.73
2012
2.67
2.51
2.83
8.89
7.81
6.80
8.94
8.31
2.84
10.09
8.55
7.40
2.18
2.78
8.58
7.73
3.44
3.28
7.93
7.22
3.47
3.43
3.39
6.87
5.90
2.88
2.60
7.21
6.52
Note : Market-based exchange rate system was introduced from March 1, 1993.