1999

6.2

1997

6.5

2000

0.0

1966

7.3

2016

5.2

2018

0.0

2004

7.8

1990

7.7

1976

7.6

2005

6.5

1967

0.0

1953

7.2

1932

6.9

1957

5.7

1971

7.0

1996

6.7

1994

6.5

1981

7.2

1991

6.7

1996

6.1