{"Year":1970,"Rate":15}
{"Year":1971,"Rate":14.7}
{"Year":1972,"Rate":14.6}
{"Year":1973,"Rate":14.1}
{"Year":1974,"Rate":14.3}
{"Year":1975,"Rate":13.9}
{"Year":1976,"Rate":14.1}
{"Year":1977,"Rate":14.1}
{"Year":1978,"Rate":14.2}
{"Year":1979,"Rate":14.6}
{"Year":1980,"Rate":14.1}
{"Year":1981,"Rate":13.9}
{"Year":1982,"Rate":13.9}
{"Year":1983,"Rate":13.7}
{"Year":1984,"Rate":13.1}
{"Year":1985,"Rate":12.6}
{"Year":1986,"Rate":12.2}
{"Year":1987,"Rate":12.6}
{"Year":1988,"Rate":12.9}
{"Year":1989,"Rate":12.6}
{"Year":1990,"Rate":12.1}
{"Year":1991,"Rate":12.5}
{"Year":1992,"Rate":11}
{"Year":1993,"Rate":11}
{"Year":1994,"Rate":11.4}
{"Year":1995,"Rate":12}
{"Year":1996,"Rate":11.1}
{"Year":1997,"Rate":11}
{"Year":1998,"Rate":11.8}
{"Year":1999,"Rate":11.2}
{"Year":2000,"Rate":10.9}
{"Year":2001,"Rate":10.7}
{"Year":2002,"Rate":10.5}
{"Year":2003,"Rate":9.9}
{"Year":2004,"Rate":10.3}
{"Year":2005,"Rate":9.4}
{"Year":2006,"Rate":9.3}
{"Year":2007,"Rate":8.7}
{"Year":2008,"Rate":8}
{"Year":2009,"Rate":8.1}
{"Year":2010,"Rate":7.4}
{"Year":2011,"Rate":7.1}
{"Year":2012,"Rate":6.6}