1930

7.0

1946

3.0

1997

6.3

1987

5.6

2002

6.7

2010

6.5

2002

6.1

1941

6.6

1960

6.4

1958

6.4

2005

4.3

1996

6.7

1996

7.0

2007

6.1

1998

6.2

1932

6.0

1988

5.1

2002

6.9

2002

5.5

1982

4.8