year,quarter,luc_ipd
1947,1,
1947,2,
1947,3,
1947,4,
1948,1,-.60763979
1948,2,-.58686143
1948,3,-.58407795
1948,4,-.5449214
1949,1,-.53825706
1949,2,-.55243939
1949,3,-.52452028
1949,4,-.53707021
1950,1,-.41232342
1950,2,-.34420252
1950,3,-.28928265
1950,4,-.25724813
1951,1,-.26811695
1951,2,-.21503872
1951,3,-.16135973
1951,4,-.15682064
1952,1,-.12578751
1952,2,-.1119111
1952,3,-.10124425
1952,4,-.01518419
1953,1,.036962423
1953,2,.065238267
1953,3,.065038554
1953,4,.045307327
1954,1,.02818585
1954,2,.030099437
1954,3,.069032654
1954,4,.13342652
1955,1,.19201331
1955,2,.22813196
1955,3,.27823046
1955,4,.28704253
1956,1,.305803
1956,2,.33380735
1956,3,.34546843
1956,4,.37903476
1957,1,.40249366
1957,2,.39628893
1957,3,.41920909
1957,4,.41371474
1958,1,.33631358
1958,2,.34060231
1958,3,.41945991
1958,4,.47265142
1959,1,.51305878
1959,2,.56595719
1959,3,.56048524
1959,4,.56271261
1960,1,.63639385
1960,2,.6264053
1960,3,.63987142
1960,4,.60578978
1961,1,.62424392
1961,2,.67483896
1961,3,.7048561
1961,4,.7532289
1962,1,.81107688
1962,2,.82702613
1962,3,.84561563
1962,4,.86273408
1963,1,.88543677
1963,2,.90626043
1963,3,.9452821
1963,4,.9661386
1964,1,.98569685
1964,2,1.0231622
1964,3,1.061174
1964,4,1.0644788
1965,1,1.0957901
1965,2,1.1119156
1965,3,1.1536031
1965,4,1.2030497
1966,1,1.2496994
1966,2,1.2559235
1966,3,1.2684629
1966,4,1.2858194
1967,1,1.3126693
1967,2,1.3318529
1967,3,1.3464339
1967,4,1.3538847
1968,1,1.4160093
1968,2,1.4505068
1968,3,1.459313
1968,4,1.4743587
1969,1,1.4916875
1969,2,1.487222
1969,3,1.4947126
1969,4,1.4918771
1970,1,1.4773073
1970,2,1.472618
1970,3,1.4925725
1970,4,1.4577937
1971,1,1.5182333
1971,2,1.5343206
1971,3,1.54784
1971,4,1.5476147
1972,1,1.6052191
1972,2,1.6432599
1972,3,1.6636784
1972,4,1.6986576
1973,1,1.7545811
1973,2,1.7497821
1973,3,1.7332412
1973,4,1.7293249
1974,1,1.6892891
1974,2,1.6871029
1974,3,1.6632917
1974,4,1.6349695
1975,1,1.6116751
1975,2,1.6346469
1975,3,1.6582664
1975,4,1.6703001
1976,1,1.720329
1976,2,1.748919
1976,3,1.758364
1976,4,1.776876
1977,1,1.7920055
1977,2,1.8237019
1977,3,1.8554016
1977,4,1.8539996
1978,1,1.8426982
1978,2,1.8721938
1978,3,1.8734914
1978,4,1.8866485
1979,1,1.8881724
1979,2,1.8917269
1979,3,1.9037979
1979,4,1.9352309
1980,1,1.9723501
1980,2,1.962556
1980,3,1.9714082
1980,4,2.0200937
1981,1,2.0368886
1981,2,2.0395427
1981,3,2.0503941
1981,4,2.0071306
1982,1,1.9866127
1982,2,1.9542547
1982,3,1.9185386
1982,4,1.883746
1983,1,1.9003205
1983,2,1.9206427
1983,3,1.9596056
1983,4,2.0178752
1984,1,2.0704043
1984,2,2.0953062
1984,3,2.0928314
1984,4,2.0632701
1985,1,2.0182343
1985,2,1.9971895
1985,3,2.0263424
1985,4,2.0873497
1986,1,2.1741259
1986,2,2.2403603
1986,3,2.2811699
1986,4,2.294636
1987,1,2.2670462
1987,2,2.2595556
1987,3,2.2617414
1987,4,2.2791049
1988,1,2.3059802
1988,2,2.3322263
1988,3,2.3515449
1988,4,2.3814566
1989,1,2.4092333
1989,2,2.4162097
1989,3,2.440444
1989,4,2.465281
1990,1,2.5002556
1990,2,2.5319903
1990,3,2.5189598
1990,4,2.4856424
1991,1,2.4634116
1991,2,2.4607999
1991,3,2.4433713
1991,4,2.4084771
1992,1,2.385628
1992,2,2.3681555
1992,3,2.3896124
1992,4,2.4408762
1993,1,2.4967465
1993,2,2.5503275
1993,3,2.5828831
1993,4,2.6031227
1994,1,2.5827281
1994,2,2.6038156
1994,3,2.6105382
1994,4,2.6529779
1995,1,2.6919575
1995,2,2.6936839
1995,3,2.6857717
1995,4,2.665339
1996,1,2.621727
1996,2,2.6028137
1996,3,2.6107285
1996,4,2.6248269
1997,1,2.677798
1997,2,2.7329645
1997,3,2.7720246
1997,4,2.8168569
1998,1,2.8515384
1998,2,2.8845186
1998,3,2.9095209
1998,4,2.9275582
1999,1,2.9640229
1999,2,2.9702551
1999,3,2.9852481
1999,4,3.026258
2000,1,3.0757186
2000,2,3.0929749
2000,3,3.1230667
2000,4,3.149128
2001,1,3.1893387
2001,2,3.1884174
2001,3,3.1637735
2001,4,3.1337705
2002,1,3.0969841
2002,2,3.0784302
2002,3,3.0810964
2002,4,3.0866971
2003,1,3.1118095
2003,2,3.1730232
2003,3,3.2372391
2003,4,3.3221321
2004,1,3.3757458
2004,2,3.4468682
2004,3,3.4950531
2004,4,3.4933732
2005,1,3.4900355
2005,2,3.4866562
2005,3,3.4855587
2005,4,3.4804816
2006,1,3.4500737
2006,2,3.4363749
2006,3,3.4177947
2006,4,3.4757729
2007,1,3.5001538
2007,2,3.4866927
2007,3,3.4871433
2007,4,3.4850535
2008,1,3.4672995
2008,2,3.4470198
2008,3,3.4162698
2008,4,3.4425628
2009,1,3.3691607
2009,2,3.3961303
2009,3,3.3984425
2009,4,3.4076948
2010,1,3.4009943
2010,2,3.4400494
2010,3,3.4581864
2010,4,3.4576828
2011,1,3.4735305
2011,2,3.4449651
2011,3,3.4462681
2011,4,3.4343491
2012,1,3.4817126
2012,2,3.4947898
2012,3,3.4898496
2012,4,3.5292757
2013,1,3.4780617
2013,2,3.5141988
2013,3,3.5211849
2013,4,3.5432363
2014,1,3.5593801
2014,2,3.5662446
2014,3,3.5902483
2014,4,3.6232018
2015,1,3.646971
2015,2,3.674345
2015,3,3.6874127
2015,4,3.7051105
2016,1,3.7270501