1987

3.8

1999

5.7

1998

5.4

1994

0.0

2002

4.7

1985

5.0

1992

4.5

1990

0.0

1960

7.1

2006

7.0

1993

8.0

2013

6.7

1988

5.0

1997

5.4

1990

7.0

2001

6.0

2001

3.0

1993

6.5

1991

6.0

2011

4.5

1989

10.0

2005

7.0

2005

6.1

1991

6.1