Year Percent Change at Annual Rate 1960-01-01 3.343392704774040 1961-01-01 3.440508625501900 1962-01-01 3.480603727120150 1963-01-01 3.411675215093330 1964-01-01 3.212788928718750 1965-01-01 2.938528215993170 1966-01-01 2.646592969064610 1967-01-01 2.403881632306120 1968-01-01 2.225252818972630 1969-01-01 2.135027307740290 1970-01-01 2.110568962276760 1971-01-01 2.104760578995520 1972-01-01 2.087351186581240 1973-01-01 2.059108907547300 1974-01-01 2.015441222975940 1975-01-01 1.962789252199940 1976-01-01 1.877017434808630 1977-01-01 1.811348256123110 1978-01-01 1.836083921770450 1979-01-01 1.981244170806440 1980-01-01 2.182944160718860 1981-01-01 2.441402230914320 1982-01-01 2.614402140694030 1983-01-01 2.540494153356920 1984-01-01 2.161357720818090 1985-01-01 1.599861888954680 1986-01-01 0.963083469953991 1987-01-01 0.441167077739427 1988-01-01 0.165023621147991 1989-01-01 0.235848351274017 1990-01-01 0.551041406675635 1991-01-01 0.935051594484538 1992-01-01 1.224066029448220 1993-01-01 1.399769580129650 1994-01-01 1.399516362917640 1995-01-01 1.275805426061470 1996-01-01 1.151057533892890 1997-01-01 1.063068231138310 1998-01-01 0.935873888646140 1999-01-01 0.769105781522415 2000-01-01 0.584652750821437 2001-01-01 0.368515792260437 2002-01-01 0.180746336269680 2003-01-01 0.114806003350716 2004-01-01 0.211133901311856 2005-01-01 0.422273670961601 2006-01-01 0.678380606318245 2007-01-01 0.890500120335519 2008-01-01 1.016364836029290 2009-01-01 1.017759552428020 2010-01-01 0.932645433767047 2011-01-01 0.826391645700175 2012-01-01 0.747986174607605 2013-01-01 0.697996515515594 2014-01-01 0.689997362346706 2015-01-01 0.713519398486428 2016-01-01 0.738287654896347 2017-01-01 0.747345050746054