1991

6.8

2001

7.8

2004

7.3

1982

5.0

2005

7.1

1982

5.5

1984

5.9

2008

6.3

2007

4.8

1978

0.0

1994

0.0

1978

0.0

1988

8.0

1968

0.0

1932

6.0

1990

7.7

1963

0.0

2016

3.5

1976

7.0

1973

0.0