2002

4.8

1980

1.0

1969

2.8

1998

6.6

2004

6.3

1980

2.0

1976

2.0

1990

4.2

1995

3.3

2014

7.4

2006

6.6

1997

6.8

2005

6.7

1977

2.0

1981

5.4

1983

3.5

2002

6.3

2003

6.8

2000

6.2

1985

6.5