1983

5.2

2005

7.0

1991

7.2

1997

7.7

1993

7.4

2005

6.3

2004

7.4

1958

6.7

1986

4.0

1995

8.1

1997

6.6

1962

7.3

2007

7.7

2001

7.0

2019

6.0

1984

7.4

1996

6.8

2019

0.0

2003

0.0

2009

0.0