4.37
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
3.68
Jan 08
3.25
3.07
Mar 08
3.54
3.45
May 08
3.40
4.89
Jul 08
2.98
3.29
Sep 08
3.77
2.86
Nov 08
3.13
2.30
Jan 09
2.94
2.89
Mar 09
3.22
2.64
May 09
3.13
3.41
Jul 09
3.18
3.45
Sep 09
3.39
3.40
Nov 09
3.10
2.38
Jan 10
2.66
3.10
Mar 10
3.17
3.01
May 10
3.10
3.48
Jul 10
3.39
3.44
Sep 10
3.63
3.34
Nov 10
2.99
2.68
Jan 11
3.01
2.85
Mar 11
2.86
3.14
May 11
3.17
3.29
Jul 11
3.48
3.74
Sep 11
3.60
3.12
Nov 11
2.76
2.83
Jan 12
3.07
2.86
Mar 12
3.50
3.26
May 12
3.26
4.17
Jul 12
3.82
3.00
Sep 12
4.51
3.55
Nov 12
2.83
3.04
Jan 13
3.19
3.22
Mar 13
3.57
3.22
May 13
3.96
3.37
Jul 13
2.89
3.46
Sep 13
3.69
2.97
Nov 13
3.67
3.34
Jan 14
2.72
2.68
Mar 14
3.11
3.17
May 14
3.80
3.85
Jul 14
3.65
4.32
Sep 14
3.79
3.07
Nov 14
3.42
3.10
Jan 15
3.18
3.45
Mar 15
3.65
3.03
May 15
3.84
3.91
Jul 15
4.29
4.15
Sep 15
3.72
3.88
Nov 15
3.36
2.94
Jan 16
3.53
3.11
Mar 16
3.21
4.04
May 16
3.62
3.57
Jul 16
5.23
4.51
Sep 16
4.04
3.83
Nov 16
3.59
4.08
Jan 17
2.51
3.31
Mar 17
3.18
4.37
May 17
