1975 12  14.60   -.82   6.89 
1976 01  15.32  -1.71   6.80 
1976 02  16.86   2.61   9.73 
1979 04  22.89   6.64  14.76 
2011 01  12.10   3.16   7.63 
2011 02  15.82   2.48   9.14 
2011 03  18.39   6.14  12.26 
2011 04  23.02   7.29  15.15 
2011 05  25.93   9.08  17.50 
2011 06  32.16  14.87  23.51 
2011 07  37.41  18.31  27.86 
2011 08  37.64  18.76  28.20 
2011 09  35.59  17.52  26.55 
2011 10  26.92  11.28  19.10 
2011 11  17.54   4.66  11.10 
2011 12  15.47   -.95   7.26 
2012 01  17.43   1.66   9.54 
2012 02  16.84   3.63  10.23 
2012 03  19.54   4.81  12.17 
2012 04  23.50   8.45  15.97 
2012 05  31.26  11.36  21.31 
2012 06  34.66  14.58  24.62 
2012 07  37.98  18.25  28.11 
2012 09  36.24  17.14  26.69 
2012 10  27.31  11.03  19.17 
2012 11  20.37   6.48  13.42 
2012 12  14.09   4.41   9.25 
2013 01  14.45   1.23   7.84 
2013 02  16.67   2.56   9.61 
2013 03  23.00   7.33  15.16 
2013 04  27.28   8.89  18.09 
2013 05  30.72  12.88  21.80 
