1982

7.6

1990

6.1

1960

8.1

1994

7.5

1966

8.2

1987

8.1

2019

8.5

2002

7.8

1994

8.0

2007

8.1

2005

7.5

1996

7.9

1968

7.6

1970

7.6

2012

7.1

2003

6.2

2009

7.7

1978

6.9

1976

7.6

1957

8.2