2002

5.3

1997

6.8

2001

5.9

1968

6.3

1963

7.4

1969

7.8

1973

7.4

1998

5.5

1967

6.7

1956

6.2

2007

7.5

1962

6.2

2017

5.7

1972

6.0

1977

7.0

1984

5.8

1967

7.8

1974

6.6

2005

6.3

1990

6.0