1993

6.6

1996

6.5

2012

6.4

1955

7.2

1989

5.5

1996

7.1

2015

6.1

1987

5.7

1968

7.4

1966

6.2

1999

6.5

1976

7.2

2002

7.6

1984

8.4

2020

6.8

2015

6.4

1988

6.3

2014

6.9

1971

8.2

1983

7.9