1992

5.3

1960

7.8

1967

7.8

1983

4.7

1978

4.3

2004

4.8

2000

4.5

2009

7.3

2002

5.3

2004

5.9

2009

6.0

1966

7.6

2016

4.4

1979

7.1

2004

5.0

2005

0.0

1987

5.9

1933

6.5

2003

4.9

2001

6.8