Quarterly
1975-03-31 0.9999
1975-06-30 0.9787
1975-09-30 0.9702
1975-12-31 0.9825
1976-03-31 1.005
1976-06-30 1.0215
1976-09-30 1.023
1976-12-31 1.0084
1977-03-31 1.0311
1977-06-30 1.0525
1977-09-30 1.0698
1977-12-31 1.1016
1978-03-31 1.113
1978-06-30 1.1268
1978-09-30 1.1432
1978-12-31 1.1781
1979-03-31 1.1861
1979-06-30 1.1589
1979-09-30 1.1666
1979-12-31 1.1748
1980-03-31 1.1639
1980-06-30 1.1696
1980-09-30 1.1581
1980-12-31 1.1832
1981-03-31 1.1936
1981-06-30 1.1983
1981-09-30 1.2108
1981-12-31 1.1919
1982-03-31 1.2093
1982-06-30 1.2448
1982-09-30 1.2502
1982-12-31 1.2312
1983-03-31 1.2271
1983-06-30 1.2311
1983-09-30 1.2326
1983-12-31 1.2382
1984-03-31 1.2555
1984-06-30 1.2927
1984-09-30 1.3135
1984-12-31 1.3184
1985-03-31 1.3532
1985-06-30 1.3691
1985-09-30 1.36
1985-12-31 1.3786
1986-03-31 1.4039
1986-06-30 1.3844
1986-09-30 1.3851
1986-12-31 1.3847
1987-03-31 1.3375
1987-06-30 1.3327
1987-09-30 1.3223
1987-12-31 1.3108
1988-03-31 1.2666
1988-06-30 1.2294
1988-09-30 1.2187
1988-12-31 1.2063
1989-03-31 1.1916
1989-06-30 1.1931
1989-09-30 1.1821
1989-12-31 1.1687
1990-03-31 1.1819
1990-06-30 1.1705
1990-09-30 1.1532
1990-12-31 1.1609
1991-03-31 1.1558
1991-06-30 1.1489
1991-09-30 1.1438
1991-12-31 1.1341
1992-03-31 1.1766
1992-06-30 1.1945
1992-09-30 1.2012
1992-12-31 1.2617
1993-03-31 1.2607
1993-06-30 1.2705
1993-09-30 1.3033
1993-12-31 1.3247
1994-03-31 1.342
1994-06-30 1.3822
1994-09-30 1.3717
1994-12-31 1.3669
1995-03-31 1.4075
1995-06-30 1.3715
1995-09-30 1.356
1995-12-31 1.3552
1996-03-31 1.3692
1996-06-30 1.3647
1996-09-30 1.3702
1996-12-31 1.3501
1997-03-31 1.3579
1997-06-30 1.3861
1997-09-30 1.3842
1997-12-31 1.4079
1998-03-31 1.4303
1998-06-30 1.4473
1998-09-30 1.5123
1998-12-31 1.5422
1999-03-31 1.5114
1999-06-30 1.4726
1999-09-30 1.4857
1999-12-31 1.4728
2000-03-31 1.4538
2000-06-30 1.4806
2000-09-30 1.4821
2000-12-31 1.526
2001-03-31 1.5287
2001-06-30 1.5402
2001-09-30 1.5445
2001-12-31 1.5805
2002-03-31 1.5943
2002-06-30 1.5552
2002-09-30 1.5629
2002-12-31 1.5701
2003-03-31 1.5104
2003-06-30 1.3977
2003-09-30 1.3797
2003-12-31 1.3163
2004-03-31 1.3189
2004-06-30 1.3597
2004-09-30 1.3083
2004-12-31 1.2207
2005-03-31 1.2268
2005-06-30 1.2441
2005-09-30 1.2021
2005-12-31 1.1739
2006-03-31 1.1551
2006-06-30 1.1217
2006-09-30 1.1212
2006-12-31 1.1387
2007-03-31 1.1719
2007-06-30 1.0964
2007-09-30 1.0458
2007-12-31 0.9808
2008-03-31 1.0042
2008-06-30 1.0104
2008-09-30 1.0411
2008-12-31 1.2111
2009-03-31 1.2458
2009-06-30 1.1667
2009-09-30 1.098
2009-12-31 1.0555
2010-03-31 1.0401
2010-06-30 1.0288
2010-09-30 1.0392
2010-12-31 1.0128
2011-03-31 0.9856
2011-06-30 0.9691
2011-09-30 0.9806
2011-12-31 1.0234
2012-03-31 1.0013
2012-06-30 1.0102
2012-09-30 0.9958
2012-12-31 0.9911
2013-03-31 1.0085
2013-06-30 1.0238
2013-09-30 1.0389
2013-12-31 1.0491
2014-03-31 1.1032
2014-06-30 1.0905
2014-09-30 1.0883
2014-12-31 1.1353
2015-03-31 1.241
2015-06-30 1.2297
2015-09-30 1.3082
2015-12-31 1.3345
2016-03-31 1.3747
2016-06-30 1.2894
2016-09-30 1.3045
2016-12-31 1.3341
2017-03-31 1.3235
2017-06-30 1.3446
2017-09-30 1.2535
2017-12-31 1.2713
2018-03-31 1.2648
2018-06-30 1.2911
2018-09-30 1.3073
2018-12-31 1.3199
2019-03-31 1.3294
2019-06-30 1.3377
2019-09-30 1.3204
2019-12-31 1.3203
2020-03-31 1.3451
2020-06-30 1.3849
2020-09-30 1.333
2020-12-31 1.3033
2021-03-31 1.2662
2021-06-30 1.2277