2011

7.1

1986

7.0

2002

6.5

1940

7.1

1992

6.3

1983

7.5

1987

5.5

1998

6.0

2006

4.1

2010

7.3

2015

4.6

2006

6.4

1988

6.2

1975

6.9

2001

7.7

1963

7.2

2016

6.4

1991

5.7

1994

5.9

1984

5.9