1934

4.1

2018

6.3

1962

6.0

1990

7.7

1966

7.1

1999

7.1

2006

5.8

2008

6.2

2008

6.6

2001

7.3

1984

6.0

2002

6.2

1960

7.2

1975

6.9

1998

7.2

1984

7.2

2001

6.8

2000

6.5

1999

6.7

1958

6.6