1989

7.2

2018

6.1

2017

6.4

2005

7.5

2005

7.8

1979

7.0

2022

6.5

1962

5.9

2018

5.9

2017

6.4

1975

8.0

2007

7.5

1995

7.0

1967

6.0

1991

7.6

1973

7.0

2000

8.1

1993

7.9

1980

7.1

1993

6.6