1977

5.8

1986

7.1

1995

6.8

1996

6.4

1963

7.9

1983

4.0

2005

0.0

1992

7.4

2001

6.6

1992

6.9

2007

4.0

1985

4.7

2001

7.7

2015

5.2

1978

6.5

1979

5.0

1984

6.7

1987

6.3

1975

6.5

2000

6.8

1982

0.0

1988

6.2