2010

7.7

1996

7.0

2006

8.6

1993

7.9

2008

7.6

2015

8.2

1979

6.8

1984

7.4

1995

7.8

2011

8.1

2001

8.6

1971

7.9

1966

8.0

1959

8.4

2003

7.6

2017

7.1

2015

7.8

2002

7.5

2008

6.7

1991

7.3