1997

5.4

1996

7.1

2003

6.8

1989

6.8

1991

4.6

1963

7.5

1995

5.8

1986

6.7

1993

7.5

1942

0.0

2018

5.1

1984

6.9

1950

7.0

2001

6.3

2004

6.5

1977

6.8

2012

6.0

1959

5.2

1996

5.5

2004

6.4