1989

7.0

2004

7.5

2009

7.7

1999

7.9

2006

7.3

2018

7.1

5.8

6.5

1976

6.7

2006

7.7

1997

6.4

1968

5.7

1996

6.8

2017

6.9

1984

7.3

1974

7.5

2022

7.2

1993

7.9

1991

7.9

1965

7.1