1968

5.8

1979

8.3

1982

7.9

2006

6.1

1959

7.8

1930

7.7

2000

7.4

1990

7.7

1966

7.1

1999

7.1

2006

5.8

2001

7.3

2002

6.2

1960

7.2

1975

6.9

1998

7.2

2000

6.5

1958

6.7

2004

6.1

1999

8.4