Quarterly Percent
1978-03-31 6.3743
1978-06-30 8.2887
1978-09-30 9.5558
1978-12-31 10.7
1979-03-31 12.535
1979-06-30 12.3276
1979-09-30 13.9755
1979-12-31 15.0066
1980-03-31 17.5841
1980-06-30 17.2826
1980-09-30 16.8778
1980-12-31 15.787
1981-03-31 14.0328
1981-06-30 11.6238
1981-09-30 13.0425
1981-12-31 15.4766
1982-03-31 14.3626
1982-06-30 13.0683
1982-09-30 11.798
1982-12-31 10.1896
1983-03-31 11.362
1983-06-30 10.3754
1983-09-30 9.6108
1983-12-31 9.2403
1984-03-31 9.2255
1984-06-30 8.5357
1984-09-30 11.2752
1984-12-31 10.2095
1985-03-31 13.2698
1985-06-30 12.8661
1985-09-30 12.0598
1985-12-31 11.6393
1986-03-31 12.3593
1986-06-30 10.7246
1986-09-30 9.9348
1986-12-31 10.5984
1987-03-31 10.9835
1987-06-30 9.2598
1987-09-30 9.2494
1987-12-31 9.1069
1988-03-31 8.3887
1988-06-30 7.6407
1988-09-30 10.2992
1988-12-31 12.1328
1989-03-31 12.8159
1989-06-30 12.585
1989-09-30 13.8616
1989-12-31 14.9197
1990-03-31 14.925
1990-06-30 14.8737
1990-09-30 14.925
1990-12-31 14.2686
1991-03-31 13.7406
1991-06-30 11.9396
1991-09-30 10.9726
1991-12-31 10.6084
1992-03-31 10.5593
1992-06-30 10.0552
1992-09-30 9.9443
1992-12-31 7.9532
1993-03-31 6.3464
1993-06-30 5.8002
1993-09-30 5.9239
1993-12-31 5.719
1994-03-31 5.202
1994-06-30 4.8682
1994-09-30 4.8968
1994-12-31 5.3844
1995-03-31 6.0113
1995-06-30 6.02
1995-09-30 6.598
1995-12-31 6.6787
1996-03-31 6.2482
1996-06-30 5.8934
1996-09-30 5.7299
1996-12-31 5.8722
1997-03-31 5.9816
1997-06-30 6.1829
1997-09-30 6.8655
1997-12-31 7.1953
1998-03-31 7.3403
1998-06-30 7.2859
1998-09-30 7.433
1998-12-31 6.9459
1999-03-31 5.7051
1999-06-30 5.1789
1999-09-30 4.9874
1999-12-31 5.152
2000-03-31 5.7784
2000-06-30 5.9382
2000-09-30 5.9346
2000-12-31 5.9017
2001-03-31 5.731
2001-06-30 5.1738
2001-09-30 4.928
2001-12-31 4.1737
2002-03-31 3.9176
2002-06-30 3.7769
2002-09-30 3.8332
2002-12-31 3.9229
2003-03-31 3.7351
2003-06-30 3.6263
2003-09-30 3.4327
2003-12-31 3.6077
2004-03-31 3.8853
2004-06-30 4.2188
2004-09-30 4.6355
2004-12-31 4.7383
2005-03-31 4.7434
2005-06-30 4.7607
2005-09-30 4.5991
2005-12-31 4.526
2006-03-31 4.4991
2006-06-30 4.5531
2006-09-30 4.729
2006-12-31 4.9882
2007-03-31 5.2982
2007-06-30 5.485
2007-09-30 5.9325
2007-12-31 5.7838
2008-03-31 5.4236
2008-06-30 5.1066
2008-09-30 5.1294
2008-12-31 3.4359
2009-03-31 1.119
2009-06-30 0.5426
2009-09-30 0.5218
2009-12-31 0.4974
2010-03-31 0.4834
2010-06-30 0.5192
2010-09-30 0.535
2010-12-31 0.5539
2011-03-31 0.5685
2011-06-30 0.5755
2011-09-30 0.5942
2011-12-31 0.6651
2012-03-31 0.6355
2012-06-30 0.5743
2012-09-30 0.5112
2012-12-31 0.4742
2013-03-31 0.4753
2013-06-30 0.475
2013-09-30 0.475
2013-12-31 0.475
2014-03-31 0.475
2014-06-30 0.4742
2014-09-30 0.4746
2014-12-31 0.4504
2015-03-31 0.45
2015-06-30 0.4504
2015-09-30 0.4496
2015-12-31 0.4492
2016-03-31 0.45
2016-06-30 0.471
2016-09-30 0.3472
2016-12-31 0.2399
2017-03-31 0.2373
2017-06-30 0.2293
2017-09-30 0.2345