Quarterly
1979-03-31 2.0343
1979-06-30 2.0776
1979-09-30 2.2285
1979-12-31 2.1552
1980-03-31 2.25
1980-06-30 2.2762
1980-09-30 2.3687
1980-12-31 2.3888
1981-03-31 2.3162
1981-06-30 2.0873
1981-09-30 1.846
1981-12-31 1.8809
1982-03-31 1.8461
1982-06-30 1.7822
1982-09-30 1.726
1982-12-31 1.6492
1983-03-31 1.5276
1983-06-30 1.5534
1983-09-30 1.5095
1983-12-31 1.4716
1984-03-31 1.4364
1984-06-30 1.3986
1984-09-30 1.2999
1984-12-31 1.2173
1985-03-31 1.1114
1985-06-30 1.2528
1985-09-30 1.3712
1985-12-31 1.4314
1986-03-31 1.4337
1986-06-30 1.5047
1986-09-30 1.4845
1986-12-31 1.4248
1987-03-31 1.5375
1987-06-30 1.6379
1987-09-30 1.615
1987-12-31 1.7512
1988-03-31 1.7944
1988-06-30 1.8379
1988-09-30 1.6912
1988-12-31 1.7863
1989-03-31 1.743
1989-06-30 1.6214
1989-09-30 1.5905
1989-12-31 1.5764
1990-03-31 1.6473
1990-06-30 1.6668
1990-09-30 1.851
1990-12-31 1.9363
1991-03-31 1.8992
1991-06-30 1.701
1991-09-30 1.6779
1991-12-31 1.765
1992-03-31 1.7618
1992-06-30 1.8
1992-09-30 1.893
1992-12-31 1.5746
1993-03-31 1.473
1993-06-30 1.5304
1993-09-30 1.501
1993-12-31 1.4882
1994-03-31 1.4863
1994-06-30 1.5038
1994-09-30 1.5508
1994-12-31 1.5847
1995-03-31 1.5827
1995-06-30 1.5954
1995-09-30 1.5728
1995-12-31 1.5598
1996-03-31 1.5303
1996-06-30 1.523
1996-09-30 1.5541
1996-12-31 1.635
1997-03-31 1.6303
1997-06-30 1.6349
1997-09-30 1.6245
1997-12-31 1.657
1998-03-31 1.6439
1998-06-30 1.6512
1998-09-30 1.6504
1998-12-31 1.6739
1999-03-31 1.6318
1999-06-30 1.6061
1999-09-30 1.6023
1999-12-31 1.6311
2000-03-31 1.6054
2000-06-30 1.5311
2000-09-30 1.4794
2000-12-31 1.4465
2001-03-31 1.4584
2001-06-30 1.4191
2001-09-30 1.4354
2001-12-31 1.4412
2002-03-31 1.4237
2002-06-30 1.4592
2002-09-30 1.5469
2002-12-31 1.5681
2003-03-31 1.5999
2003-06-30 1.6168
2003-09-30 1.6082
2003-12-31 1.702
2004-03-31 1.8337
2004-06-30 1.8013
2004-09-30 1.8139
2004-12-31 1.8605
2005-03-31 1.8873
2005-06-30 1.8527
2005-09-30 1.7835
2005-12-31 1.7473
2006-03-31 1.7528
2006-06-30 1.8312
2006-09-30 1.8759
2006-12-31 1.9151
2007-03-31 1.9545
2007-06-30 1.9865
2007-09-30 2.0201
2007-12-31 2.0437
2008-03-31 1.9744
2008-06-30 1.9663
2008-09-30 1.8896
2008-12-31 1.573
2009-03-31 1.4337
2009-06-30 1.5532
2009-09-30 1.6405
2009-12-31 1.6339
2010-03-31 1.558
2010-06-30 1.4908
2010-09-30 1.5507
2010-12-31 1.5807
2011-03-31 1.603
2011-06-30 1.628
2011-09-30 1.6086
2011-12-31 1.5715
2012-03-31 1.571
2012-06-30 1.5831
2012-09-30 1.5797
2012-12-31 1.6056
2013-03-31 1.5516
2013-06-30 1.5354
2013-09-30 1.5501
2013-12-31 1.6181
2014-03-31 1.6548
2014-06-30 1.6828
2014-09-30 1.6695
2014-12-31 1.5834
2015-03-31 1.5135
2015-06-30 1.5337
2015-09-30 1.5485
2015-12-31 1.5172
2016-03-31 1.4308
2016-06-30 1.4344
2016-09-30 1.3134
2016-12-31 1.2424
2017-03-31 1.2402
2017-06-30 1.2818
2017-09-30 1.3102
2017-12-31 1.3282
2018-03-31 1.3936
2018-06-30 1.3621
2018-09-30 1.3053
2018-12-31 1.2889
2019-03-31 1.3046
2019-06-30 1.2872
2019-09-30 1.2348
2019-12-31 1.2883
2020-03-31 1.2803
2020-06-30 1.242
2020-09-30 1.2917
2020-12-31 1.3209
2021-03-31 1.3793
2021-06-30 1.3988