Year	U.S.=100
1970-01-01	43.24613609
1971-01-01	41.96044482
1972-01-01	42.76561241
1973-01-01	44.35005190
1974-01-01	52.97847214
1975-01-01	48.67799122
1976-01-01	44.84459201
1977-01-01	49.40038843
1978-01-01	49.45861086
1979-01-01	51.25370062
1980-01-01	51.82560852
1981-01-01	48.81469779
1982-01-01	48.06767363
1983-01-01	47.42353281
1984-01-01	44.19094737
1985-01-01	36.92588540
1986-01-01	36.93676156
1987-01-01	41.98854341
1988-01-01	44.64778614
1989-01-01	50.38858641
1990-01-01	75.46913809
1991-01-01	79.42196284
1992-01-01	108.75237760
1993-01-01	287.17886820
1994-01-01	13.05239753
1995-01-01	22.71090558
1996-01-01	28.20486200
1997-01-01	27.52377190
1998-01-01	31.24125900
1999-01-01	30.37750279
2000-01-01	30.27927792
2001-01-01	25.00807551
2002-01-01	31.57094895
2003-01-01	33.83359207
2004-01-01	37.11470877
2005-01-01	40.12533414
2006-01-01	44.70300456
2007-01-01	47.04654354
2008-01-01	54.19442616
2009-01-01	55.43157528
2010-01-01	59.33854555