1982

7.6

2003

6.2

2013

5.8

1995

5.9

1997

4.5

2006

5.2

1935

4.8

1984

5.1

1985

5.9

1986

4.6

2005

7.7

0.0

1991

6.2

1990

6.7

1993

5.5

2007

6.1

2004

7.2

1969

0.0

2016

7.2

2001

4.8