1967

7.5

2004

7.5

2005

6.1

1979

7.3

2019

6.7

2017

6.9

2002

7.3

1998

6.9

2006

7.5

2007

6.4

1994

6.4

1968

7.6

1982

7.9

1960

8.1

1989

7.1

2022

8.0

1987

7.8

2023

5.0

2000

8.1

1985

7.2