2006

6.3

2007

6.9

2000

6.5

1960

7.3

2002

6.3

2003

5.3

2016

7.3

1962

7.0

1963

7.1

1964

7.4

1959

7.9

1967

6.6

1969

6.6

2001

7.9

2005

7.8

1974

6.4

1977

6.8

1979

6.2

1956

6.6

1980

7.4