Quarterly
1975-03-31 2.4027
1975-06-30 2.1844
1975-09-30 2.0429
1975-12-31 2.0231
1976-03-31 1.915
1976-06-30 1.7841
1976-09-30 1.6681
1976-12-31 1.7021
1977-03-31 1.7201
1977-06-30 1.7202
1977-09-30 1.7475
1977-12-31 1.9185
1978-03-31 1.8625
1978-06-30 1.8605
1978-09-30 1.9739
1978-12-31 2.041
1979-03-31 2.0665
1979-06-30 2.1715
1979-09-30 2.202
1979-12-31 2.225
1980-03-31 2.164
1980-06-30 2.357
1980-09-30 2.3883
1980-12-31 2.392
1981-03-31 2.242
1981-06-30 1.9384
1981-09-30 1.8105
1981-12-31 1.911
1982-03-31 1.7833
1982-06-30 1.743
1982-09-30 1.6947
1982-12-31 1.6175
1983-03-31 1.4816
1983-06-30 1.5346
1983-09-30 1.495
1983-12-31 1.452
1984-03-31 1.4415
1984-06-30 1.3563
1984-09-30 1.2387
1984-12-31 1.158
1985-03-31 1.23
1985-06-30 1.312
1985-09-30 1.407
1985-12-31 1.4455
1986-03-31 1.478
1986-06-30 1.5335
1986-09-30 1.4477
1986-12-31 1.4837
1987-03-31 1.6042
1987-06-30 1.6125
1987-09-30 1.629
1987-12-31 1.887
1988-03-31 1.8845
1988-06-30 1.7055
1988-09-30 1.686
1988-12-31 1.808
1989-03-31 1.6855
1989-06-30 1.5502
1989-09-30 1.619
1989-12-31 1.6125
1990-03-31 1.6455
1990-06-30 1.744
1990-09-30 1.8705
1990-12-31 1.9295
1991-03-31 1.7385
1991-06-30 1.6215
1991-09-30 1.7505
1991-12-31 1.8678
1992-03-31 1.735
1992-06-30 1.903
1992-09-30 1.777
1992-12-31 1.515
1993-03-31 1.5062
1993-06-30 1.5005
1993-09-30 1.4982
1993-12-31 1.478
1994-03-31 1.4845
1994-06-30 1.5432
1994-09-30 1.5772
1994-12-31 1.5645
1995-03-31 1.628
1995-06-30 1.5908
1995-09-30 1.5825
1995-12-31 1.5505
1996-03-31 1.5262
1996-06-30 1.5537
1996-09-30 1.564
1996-12-31 1.712
1997-03-31 1.6303
1997-06-30 1.6636
1997-09-30 1.6153
1997-12-31 1.6453
1998-03-31 1.6745
1998-06-30 1.6673
1998-09-30 1.6997
1998-12-31 1.664
1999-03-31 1.6137
1999-06-30 1.5768
1999-09-30 1.6466
1999-12-31 1.6121
2000-03-31 1.5952
2000-06-30 1.5141
2000-09-30 1.4783
2000-12-31 1.495
2001-03-31 1.4217
2001-06-30 1.4066
2001-09-30 1.4699
2001-12-31 1.4556
2002-03-31 1.4241
2002-06-30 1.5258
2002-09-30 1.5726
2002-12-31 1.6095
2003-03-31 1.5805
2003-06-30 1.6502
2003-09-30 1.6614
2003-12-31 1.7905
2004-03-31 1.8379
2004-06-30 1.8137
2004-09-30 1.8094
2004-12-31 1.9199
2005-03-31 1.8904
2005-06-30 1.7925
2005-09-30 1.7688
2005-12-31 1.7166
2006-03-31 1.7345
2006-06-30 1.8494
2006-09-30 1.8682
2006-12-31 1.957
2007-03-31 1.9613
2007-06-30 2.0064
2007-09-30 2.0374
2007-12-31 1.9909
2008-03-31 1.9875
2008-06-30 1.9901
2008-09-30 1.7821
2008-12-31 1.4376
2009-03-31 1.4331
2009-06-30 1.6468
2009-09-30 1.5993
2009-12-31 1.6148
2010-03-31 1.5167
2010-06-30 1.4962
2010-09-30 1.5755
2010-12-31 1.5655
2011-03-31 1.603
2011-06-30 1.6056
2011-09-30 1.5579
2011-12-31 1.5461
2012-03-31 1.5981
2012-06-30 1.5686
2012-09-30 1.6149
2012-12-31 1.6168
2013-03-31 1.5181
2013-06-30 1.5167
2013-09-30 1.6194
2013-12-31 1.6528
2014-03-31 1.6673
2014-06-30 1.7097
2014-09-30 1.6212
2014-12-31 1.5608
2015-03-31 1.4847
2015-06-30 1.5729
2015-09-30 1.5147
2015-12-31 1.4819
2016-03-31 1.4378
2016-06-30 1.3429
2016-09-30 1.2991
2016-12-31 1.2303
2017-03-31 1.2507
2017-06-30 1.299
2017-09-30 1.3416
2017-12-31 1.351
2018-03-31 1.4033
2018-06-30 1.3203
2018-09-30 1.3041
2018-12-31 1.2769
2019-03-31 1.303
2019-06-30 1.2728
2019-09-30 1.232
2019-12-31 1.321
2020-03-31 1.2403
2020-06-30 1.2359
2020-09-30 1.2924
2020-12-31 1.3649
2021-03-31 1.3796
2021-06-30 1.3819
2021-09-30 1.3484
2021-12-31 1.3477
2022-03-31 1.3162
2022-06-30 1.2143
2022-09-30 1.117
2022-12-31 1.2039
2023-03-31 1.2364
2023-06-30 1.2714
2023-09-30 1.2207
2023-12-31 1.2747