1966

7.2

1999

6.8

1962

7.3

1968

7.8

1999

5.7

1957

7.8

2004

7.2

1988

7.2

1993

5.5

1968

7.6

2007

7.7

2001

7.9

1999

8.5

1975

8.4

1995

8.0

2017

7.1

2019

6.4

1999

8.4

1972

7.1

2001

7.4