1961

7.5

2015

8.7

1992

6.9

1998

8.6

2004

8.6

1980

7.3

1997

8.1

1990

7.6

1994

6.8

1995

7.9

2005

8.1

2022

7.0

2015

7.8

2007

7.7

1992

8.2

2002

8.0

2004

7.8

1986

8.2

1997

7.5

1983

6.8