1997

5.6

2017

7.2

1986

6.0

1984

0.0

2019

0.0

1980

7.8

2002

6.3

1983

4.7

2008

7.0

2017

8.0

2005

7.6

1976

6.6

1970

7.1

1974

7.7

1962

7.9

2000

6.9

1957

7.8

1991

2.0

2014

6.2

1999

7.5