1932

7.3

1998

6.8

2001

7.8

2004

7.3

2007

6.3

1992

7.7

1999

7.4

2006

6.6

1988

7.0

1981

6.5

1983

6.1

1994

7.0

1988

7.5

1995

8.0

1999

7.6

2004

7.3

1988

0.0

2018

6.4

2013

8.5

2008

6.5