2019

5.4

2006

6.5

2009

5.9

2002

5.9

1981

6.0

1987

5.6

2008

7.5

1979

5.3

2003

6.6

1961

7.6

1974

7.8

1983

4.2

1992

4.4

1983

5.0

2005

6.0

1976

7.0

2003

6.0

2007

5.9

1950

8.1

1972

6.3