Do you have a list of the above chart from previous months?
Yes:
2012/04/30 -8.34303562
+1977.70657444 2012/05/31 1969.36353882
-2486.30832957 2012/06/30 -516.94479075
+2526.33884886 2012/07/31 2009.39405811
+7745.52421697 2012/08/31 9754.91827508
+2213.71305627 2012/09/30 11968.63133135
-1995.05289803 2012/10/31 9973.57843332
+6176.88060145 2012/11/30 16150.45903477
+17171.39821715 2012/12/31 33321.85725192
+20021.26392603 2013/01/31 53343.12117795
+13333.24627993 2013/02/28 66676.36745788
+1166.55910974 2013/03/31 67842.92656762
+3760.48177700 2013/04/30 71603.40834462