Created with Raphaël 2.1.2
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Jan 08
Mar 08
May 08
Jul 08
Sep 08
Nov 08
Jan 09
Mar 09
May 09
Jul 09
Sep 09
Nov 09
Jan 10
Mar 10
May 10
Jul 10
Sep 10
Nov 10
Jan 11
Mar 11
May 11
Jul 11
Sep 11
Nov 11
Jan 12
Mar 12
May 12
Jul 12
Sep 12
Nov 12
Jan 13
Mar 13
May 13
Jul 13
Sep 13
Nov 13
Jan 14
Mar 14
May 14
Jul 14
Sep 14
Nov 14
Jan 15
Mar 15
May 15
Jul 15
Sep 15
Nov 15
Jan 16
Mar 16
May 16
Jul 16
Sep 16
Nov 16
Jan 17
Mar 17
May 17