1988 01 16.750000 1988 02 15.730000 1988 03 14.730000 1988 04 16.600000 1988 05 16.310000 1988 06 15.540000 1988 07 14.910000 1988 08 14.890000 1988 09 13.180000 1988 10 12.410000 1988 11 13.020000 1988 12 15.310000 1989 01 17.170000 1989 02 16.890000 1989 03 18.700000 1989 04 20.320000 1989 05 18.630000 1989 06 17.670000 1989 07 17.620000 1989 08 16.770000 1989 09 17.770000 1989 10 18.910000 1989 11 18.730000 1989 12 19.840000 1990 01 21.250000 1990 02 19.810000 1990 03 18.390000 1990 04 16.610000 1990 05 16.350000 1990 06 15.100000 1990 07 17.170000 1990 08 27.170000 1990 09 34.900000 1990 10 36.020000 1990 11 33.070000 1990 12 28.270000 1991 01 23.570000 1991 02 19.540000 1991 03 19.080000 1991 04 19.180000 1991 05 19.190000 1991 06 18.170000 1991 07 19.400000 1991 08 19.770000 1991 09 20.500000 1991 10 22.210000 1991 11 21.110000 1991 12 18.410000 1992 01 18.160000 1992 02 18.050000 1992 03 17.630000 1992 04 18.920000 1992 05 19.890000 1992 06 21.160000 1992 07 20.240000 1992 08 19.740000 1992 09 20.270000 1992 10 20.260000 1992 11 19.210000 1992 12 18.140000 1993 01 17.390000 1993 02 18.470000 1993 03 18.790000 1993 04 18.670000 1993 05 18.510000 1993 06 17.650000 1993 07 16.780000 1993 08 16.700000 1993 09 16.010000 1993 10 16.610000 1993 11 15.200000 1993 12 13.730000 1994 01 14.290000 1994 02 13.800000 1994 03 13.820000 1994 04 15.230000 1994 05 16.190000 1994 06 16.760000 1994 07 17.600000 1994 08 16.890000 1994 09 15.900000 1994 10 16.490000 1994 11 17.190000 1994 12 15.930000 1995 01 16.550000 1995 02 17.110000 1995 03 17.010000 1995 04 18.650000 1995 05 18.350000 1995 06 17.310000 1995 07 15.850000 1995 08 16.100000 1995 09 16.700000 1995 10 16.110000 1995 11 16.860000 1995 12 17.930000 1996 01 17.850000 1996 02 18 1996 03 19.850000 1996 04 20.900000 1996 05 19.150000 1996 06 18.460000 1996 07 19.570000 1996 08 20.510000 1996 09 22.630000 1996 10 24.160000 1996 11 22.760000 1996 12 23.780000 1997 01 23.540000 1997 02 20.850000 1997 03 19.130000 1997 04 17.560000 1997 05 19.020000 1997 06 17.580000 1997 07 18.460000 1997 08 18.600000 1997 09 18.460000 1997 10 19.870000 1997 11 19.170000 1997 12 17.180000 1998 01 15.190000 1998 02 14.070000 1998 03 13.100000 1998 04 13.530000 1998 05 14.360000 1998 06 12.210000 1998 07 12.080000 1998 08 11.910000 1998 09 13.340000 1998 10 12.700000 1998 11 11.040000 1998 12 9.820000 1999 01 11.110000 1999 02 10.270000 1999 03 12.510000 1999 04 15.290000 1999 05 15.230000 1999 06 15.860000 1999 07 19.080000 1999 08 20.220000 1999 09 22.540000 1999 10 22 1999 11 24.580000 1999 12 25.470000 2000 01 25.510000 2000 02 27.780000 2000 03 27.490000 2000 04 22.760000 2000 05 27.740000 2000 06 29.800000 2000 07 28.680000 2000 08 30.200000 2000 09 33.140000 2000 10 30.960000 2000 11 32.550000 2000 12 25.660000 2001 01 25.620000 2001 02 27.500000 2001 03 24.500000 2001 04 25.660000 2001 05 28.310000 2001 06 27.850000 2001 07 24.610000 2001 08 25.680000 2001 09 25.620000 2001 10 20.540000 2001 11 18.800000 2001 12 18.710000 2002 01 19.420000 2002 02 20.280000 2002 03 23.700000 2002 04 25.730000 2002 05 25.350000 2002 06 24.080000 2002 07 25.740000 2002 08 26.650000 2002 09 28.400000 2002 10 27.540000 2002 11 24.340000 2002 12 28.330000 2003 01 31.180000 2003 02 32.770000 2003 03 30.610000 2003 04 25 2003 05 25.860000 2003 06 27.650000 2003 07 28.350000 2003 08 29.890000 2003 09 27.110000 2003 10 29.610000 2003 11 28.750000 2003 12 29.810000 2004 01 31.280000 2004 02 30.860000 2004 03 33.630000 2004 04 33.590000 2004 05 37.570000 2004 06 35.180000 2004 07 38.220000 2004 08 42.740000 2004 09 43.200000 2004 10 49.780000 2004 11 43.110000 2004 12 39.600000 2005 01 44.510000 2005 02 45.480000 2005 03 53.100000 2005 04 51.880000 2005 05 48.650000 2005 06 54.350000 2005 07 57.520000 2005 08 63.980000 2005 09 62.910000 2005 10 58.540000 2005 11 55.240000 2005 12 56.860000 2006 01 62.990000 2006 02 60.210000 2006 03 62.060000 2006 04 70.260000 2006 05 69.780000 2006 06 68.560000 2006 07 73.670000 2006 08 73.230000 2006 09 61.960000 2006 10 57.810000 2006 11 58.760000 2006 12 62.470000 2007 01 53.680000 2007 02 57.560000 2007 03 62.050000 2007 04 67.490000 2007 05 67.210000 2007 06 71.050000 2007 07 76.930000 2007 08 70.760000 2007 09 77.170000 2007 10 82.340000 2007 11 92.410000 2007 12 90.930000 2008 01 92.180000 2008 02 94.990000 2008 03 103.640000 2008 04 109.070000 2008 05 122.800000 2008 06 132.320000 2008 07 132.720000 2008 08 113.240000 2008 09 97.230000 2008 10 71.580000 2008 11 52.450000 2008 12 39.950000 2009 01 43.440000 2009 02 43.320000 2009 03 46.540000 2009 04 50.180000 2009 05 57.300000 2009 06 68.610000 2009 07 64.440000 2009 08 72.510000 2009 09 67.650000