Quarterly
1979-03-31 2.0577
1979-06-30 2.1398
1979-09-30 2.1898
1979-12-31 2.2034
1980-03-31 2.1777
1980-06-30 2.2958
1980-09-30 2.3773
1980-12-31 2.416
1981-03-31 2.2675
1981-06-30 1.9808
1981-09-30 1.8223
1981-12-31 1.9029
1982-03-31 1.8008
1982-06-30 1.7686
1982-09-30 1.7079
1982-12-31 1.6114
1983-03-31 1.4778
1983-06-30 1.5356
1983-09-30 1.4963
1983-12-31 1.4567
1984-03-31 1.455
1984-06-30 1.375
1984-09-30 1.2443
1984-12-31 1.1533
1985-03-31 1.2138
1985-06-30 1.2855
1985-09-30 1.3882
1985-12-31 1.4196
1986-03-31 1.4557
1986-06-30 1.5119
1986-09-30 1.4156
1986-12-31 1.4505
1987-03-31 1.5807
1987-06-30 1.5987
1987-09-30 1.614
1987-12-31 1.8739
1988-03-31 1.8712
1988-06-30 1.6885
1988-09-30 1.6617
1988-12-31 1.778
1989-03-31 1.6672
1989-06-30 1.5126
1989-09-30 1.5784
1989-12-31 1.5633
1990-03-31 1.5949
1990-06-30 1.6912
1990-09-30 1.8139
1990-12-31 1.8755
1991-03-31 1.6952
1991-06-30 1.5869
1991-09-30 1.713
1991-12-31 1.807
1992-03-31 1.6819
1992-06-30 1.8472
1992-09-30 1.7305
1992-12-31 1.4918
1993-03-31 1.4876
1993-06-30 1.4824
1993-09-30 1.4803
1993-12-31 1.4656
1994-03-31 1.4757
1994-06-30 1.5414
1994-09-30 1.5721
1994-12-31 1.5639
1995-03-31 1.6243
1995-06-30 1.5821
1995-09-30 1.5766
1995-12-31 1.544
1996-03-31 1.522
1996-06-30 1.5532
1996-09-30 1.5625
1996-12-31 1.7034
1997-03-31 1.6255
1997-06-30 1.6544
1997-09-30 1.6034
1997-12-31 1.6312
1998-03-31 1.6602
1998-06-30 1.6501
1998-09-30 1.6837
1998-12-31 1.6583
1999-03-31 1.6135
1999-06-30 1.5803
1999-09-30 1.647
1999-12-31 1.6117
2000-03-31 1.5968
2000-06-30 1.5199
2000-09-30 1.4828
2000-12-31 1.4981
2001-03-31 1.418
2001-06-30 1.3967
2001-09-30 1.4565
2001-12-31 1.4406
2002-03-31 1.41
2002-06-30 1.5083
2002-09-30 1.5559
2002-12-31 1.5897
2003-03-31 1.5626
2003-06-30 1.6308
2003-09-30 1.6398
2003-12-31 1.7647
2004-03-31 1.8074
2004-06-30 1.7862
2004-09-30 1.7854
2004-12-31 1.9009
2005-03-31 1.8758
2005-06-30 1.7851
2005-09-30 1.7668
2005-12-31 1.7183
2006-03-31 1.7394
2006-06-30 1.8573
2006-09-30 1.8707
2006-12-31 1.9572
2007-03-31 1.9582
2007-06-30 1.9998
2007-09-30 2.0274
2007-12-31 1.98
2008-03-31 1.9584
2008-06-30 1.9624
2008-09-30 1.7802
2008-12-31 1.4349
2009-03-31 1.4346
2009-06-30 1.6461
2009-09-30 1.5989
2009-12-31 1.613
2010-03-31 1.5151
2010-06-30 1.496
2010-09-30 1.5735
2010-12-31 1.5629
2011-03-31 1.5982
2011-06-30 1.6021
2011-09-30 1.5554
2011-12-31 1.5433
2012-03-31 1.5962
2012-06-30 1.5678
2012-09-30 1.6141
2012-12-31 1.6158
2013-03-31 1.5169
2013-06-30 1.5151
2013-09-30 1.6173
2013-12-31 1.6505
2014-03-31 1.665
2014-06-30 1.7066
2014-09-30 1.6182
2014-12-31 1.5585
2015-03-31 1.4831
2015-06-30 1.571
2015-09-30 1.5137
2015-12-31 1.4827
2016-03-31 1.4392
2016-06-30 1.3453
2016-09-30 1.3042
2016-12-31 1.236
2017-03-31 1.2566
2017-06-30 1.3063
2017-09-30 1.3491
2017-12-31 1.3596
2018-03-31 1.4142
2018-06-30 1.3317
2018-09-30 1.316
2018-12-31 1.2881
2019-03-31 1.3145
2019-06-30 1.2823
2019-09-30 1.2402
2019-12-31 1.3275