2015

7.1

1988

6.0

2007

5.7

1969

6.6

2004

7.3

1996

7.8

1965

6.7

1993

7.5

2014

6.2

1990

7.4

2009

7.1

2002

6.4

1998

7.0

1981

7.0

1941

7.3

1971

7.1

2009

5.3

2006

7.9

1988

5.2

2010

6.6