Year	U.S.=100
1970-01-01	35.60981250
1971-01-01	35.64853635
1972-01-01	36.49766701
1973-01-01	34.51407072
1974-01-01	32.69952430
1975-01-01	39.22230218
1976-01-01	43.11016341
1977-01-01	44.06999765
1978-01-01	44.50698022
1979-01-01	41.63179288
1980-01-01	39.84553367
1981-01-01	42.79903556
1982-01-01	42.52162658
1983-01-01	37.85826450
1984-01-01	35.39503973
1985-01-01	39.59932315
1986-01-01	38.11067036
1987-01-01	34.87072541
1988-01-01	36.22351231
1989-01-01	34.86058101
1990-01-01	25.80896213
1991-01-01	28.49503921
1992-01-01	27.04152151
1993-01-01	21.23850269
1994-01-01	20.75722923
1995-01-01	20.49971719
1996-01-01	22.38152192
1997-01-01	24.53058920
1998-01-01	24.64035706
1999-01-01	18.06590535
2000-01-01	16.86145250
2001-01-01	16.88435073
2002-01-01	18.49324169
2003-01-01	19.47255308
2004-01-01	20.01140901
2005-01-01	22.73533550
2006-01-01	23.01788941
2007-01-01	24.59721467
2008-01-01	25.94313484
2009-01-01	26.48322816
2010-01-01	25.86311455