Quarterly Percent
1978-03-31 7.3543
1978-06-30 9.396
1978-09-30 9.8595
1978-12-31 11.6912
1979-03-31 12.4501
1979-06-30 11.9218
1979-09-30 13.622
1979-12-31 15.416
1980-03-31 17.0041
1980-06-30 16.211
1980-09-30 15.1852
1980-12-31 14.9439
1981-03-31 12.9119
1981-06-30 12.5827
1981-09-30 14.3591
1981-12-31 15.4927
1982-03-31 14.3607
1982-06-30 13.3775
1982-09-30 11.5028
1982-12-31 9.8404
1983-03-31 11.1465
1983-06-30 10.2594
1983-09-30 10.2471
1983-12-31 9.6449
1984-03-31 9.5145
1984-06-30 9.7332
1984-09-30 11.2901
1984-12-31 10.3023
1985-03-31 12.4322
1985-06-30 12.3328
1985-09-30 11.4702
1985-12-31 11.4835
1986-03-31 12.228
1986-06-30 9.8457
1986-09-30 9.9455
1986-12-31 11.2326
1987-03-31 10.4029
1987-06-30 9.1237
1987-09-30 9.9555
1987-12-31 9.3505
1988-03-31 9.1952
1988-06-30 8.7649
1988-09-30 11.4355
1988-12-31 12.4138
1989-03-31 12.9635
1989-06-30 13.5736
1989-09-30 13.8429
1989-12-31 14.9474
1990-03-31 15.2402
1990-06-30 15.2172
1990-09-30 14.8569
1990-12-31 13.373
1991-03-31 12.7338
1991-06-30 11.3035
1991-09-30 10.5977
1991-12-31 10.4485
1992-03-31 10.4875
1992-06-30 10.1885
1992-09-30 10.1653
1992-12-31 7.2502
1993-03-31 6.1174
1993-06-30 5.9605
1993-09-30 5.7916
1993-12-31 5.4284
1994-03-31 5.2327
1994-06-30 5.3929
1994-09-30 5.8865
1994-12-31 6.6188
1995-03-31 7.072
1995-06-30 6.9518
1995-09-30 6.8446
1995-12-31 6.565
1996-03-31 6.1354
1996-06-30 6.0145
1996-09-30 5.781
1996-12-31 6.3405
1997-03-31 6.4186
1997-06-30 6.6831
1997-09-30 7.2527
1997-12-31 7.5587
1998-03-31 7.476
1998-06-30 7.5137
1998-09-30 7.567
1998-12-31 6.5478
1999-03-31 5.3625
1999-06-30 5.1907
1999-09-30 5.5107
1999-12-31 6.0458
2000-03-31 6.3277
2000-06-30 6.3373
2000-09-30 6.24
2000-12-31 6.0213
2001-03-31 5.5298
2001-06-30 5.2135
2001-09-30 4.95
2001-12-31 4.095
2002-03-31 4.1535
2002-06-30 4.3161
2002-09-30 4.0086
2002-12-31 3.9303
2003-03-31 3.6853
2003-06-30 3.5091
2003-09-30 3.5528
2003-12-31 4.0205
2004-03-31 4.251
2004-06-30 4.7084
2004-09-30 4.9918
2004-12-31 4.8716
2005-03-31 4.9065
2005-06-30 4.8286
2005-09-30 4.5022
2005-12-31 4.5522
2006-03-31 4.5418
2006-06-30 4.7111
2006-09-30 4.9524
2006-12-31 5.2612
2007-03-31 5.6101
2007-06-30 5.8519
2007-09-30 6.3134
2007-12-31 6.1804
2008-03-31 5.6268
2008-06-30 5.9432
2008-09-30 5.9685
2008-12-31 4.7674
2009-03-31 2.2272
2009-06-30 1.5594
2009-09-30 1.0568
2009-12-31 0.8127
2010-03-31 0.8381
2010-06-30 0.9133
2010-09-30 1.02
2010-12-31 1.0344
2011-03-31 1.0646
2011-06-30 1.0958
2011-09-30 1.1738
2011-12-31 1.339
2012-03-31 1.3981
2012-06-30 1.3162
2012-09-30 1.0032
2012-12-31 0.7102
2013-03-31 0.6296
2013-06-30 0.5669
2013-09-30 0.5771
2013-12-31 0.5894
2014-03-31 0.5918
2014-06-30 0.6501
2014-09-30 0.6741
2014-12-31 0.6767
2015-03-31 0.6712
2015-06-30 0.6992
2015-09-30 0.79
2015-12-31 0.79
2016-03-31 0.79
2016-06-30 0.7891
2016-09-30 0.634
2016-12-31 0.5641
2017-03-31 0.5247
2017-06-30 0.492
2017-09-30 0.4916