1989

8.0

1989

8.3

2007

7.9

2011

7.4

2009

7.9

2009

7.6

2018

0.0

2021

8.9

1997

7.0

1982

6.3

1971

7.5

2002

6.5

1980

5.5

1967

6.4

1961

7.4

2006

4.2

1996

6.8

1998

7.1

1962

7.0

1991

7.8