1996

6.4

2001

7.8

1980

7.3

1997

6.6

1999

6.3

2002

6.0

1987

6.9

2014

6.2

2005

0.0

1993

7.6

2018

5.6

1981

5.2

2008

3.0

2003

5.6

2004

6.3

1979

7.8

1966

4.4

2002

4.4

2000

4.7

2000

6.4