1999

6.3

2008

7.9

1993

3.0

1981

0.0

1985

5.7

2003

0.0

2014

6.0

1972

7.1

1982

7.2

1993

6.6

2007

5.2

2005

8.0

2006

6.7

1998

6.3

2004

7.0

2002

6.5

2008

6.8

1992

6.5

2003

6.9

1953

8.0