1996

6.4

1988

5.5

2013

8.2

1971

8.1

1998

10.0

1990

4.8

1994

7.8

1990

6.0

1984

7.2

1997

3.3

1987

7.7

1992

5.8

1993

3.0

2002

7.9

1985

7.5

1986

5.9

1994

5.7

1985

7.5

1995

5.1

2002

7.3