Year	Index 2010=1
1970-01-01	0.392044761538397
1971-01-01	0.427611787276091
1972-01-01	0.451243335205236
1973-01-01	0.486307881942935
1974-01-01	0.528488019851668
1975-01-01	0.558660714954718
1976-01-01	0.571318874512626
1977-01-01	0.589946390753053
1978-01-01	0.609056613597471
1979-01-01	0.629113350095459
1980-01-01	0.672718773069873
1981-01-01	0.699249287881604
1982-01-01	0.726394696850259
1983-01-01	0.731289978598411
1984-01-01	0.737173256903575
1985-01-01	0.745613379127421
1986-01-01	0.766841654392681
1987-01-01	0.789847094780634
1988-01-01	0.791372636162786
1989-01-01	0.794032640342464
1990-01-01	0.814773473684829
1991-01-01	0.858227785900416
1992-01-01	0.917378796002062
1993-01-01	0.955286784727423
1994-01-01	0.963300681715430
1995-01-01	0.983552068327524
1996-01-01	0.984974579307070
1997-01-01	0.972772381381258
1998-01-01	0.974397724616443
1999-01-01	0.982634449433923
2000-01-01	0.983891194677754
2001-01-01	0.983848515535094
2002-01-01	0.986432375943029
2003-01-01	0.993816810918723
2004-01-01	0.985596946927778
2005-01-01	0.975099306277798
2006-01-01	0.950848974469983
2007-01-01	0.936468460641293
2008-01-01	0.957374267947792
2009-01-01	1.019060355112540
2010-01-01	1.000000000000000