Year Index 2010=1, Trend 1970-01-01 0.0626586522862807 1971-01-01 0.0712812598987240 1972-01-01 0.0801935425693163 1973-01-01 0.0928874925806446 1974-01-01 0.1159360322141830 1975-01-01 0.1430478350178340 1976-01-01 0.1620344889473110 1977-01-01 0.1722485538581930 1978-01-01 0.1797778972169050 1979-01-01 0.1974515975064350 1980-01-01 0.2285415387358890 1981-01-01 0.2536174793351690 1982-01-01 0.2740326805022970 1983-01-01 0.2980294874429640 1984-01-01 0.3279355318989770 1985-01-01 0.3539634057527390 1986-01-01 0.3791585303412410 1987-01-01 0.4270302712164240 1988-01-01 0.4694764342202040 1989-01-01 0.5173065205110430 1990-01-01 0.5723302583451200 1991-01-01 0.5898730293596640 1992-01-01 0.5618932959755810 1993-01-01 0.5300656515426330 1994-01-01 0.5313700074342140 1995-01-01 0.5472061361687790 1996-01-01 0.5424719472966780 1997-01-01 0.5471437622781690 1998-01-01 0.5746677288339490 1999-01-01 0.6099622999658640 2000-01-01 0.6559234613014720 2001-01-01 0.7032247028403400 2002-01-01 0.7331804823597840 2003-01-01 0.7510377041381600 2004-01-01 0.7751040008490260 2005-01-01 0.8113891353751140 2006-01-01 0.8495197842951860 2007-01-01 0.8781533161130500 2008-01-01 0.9218574763229780 2009-01-01 0.9699074817875960 2010-01-01 1.0000000000000000