2004

5.0

1992

4.7

2000

6.0

1996

5.0

1992

4.8

2013

5.8

1982

4.3

1989

7.2

1998

2.6

2000

0.0

1976

5.8

2005

5.5

1979

7.7

1986

6.8

1985

6.6

1993

5.5

1987

5.1

1999

6.4