1995

3.8

1970

10.0

1993

5.5

1976

3.3

1993

3.7

1975

6.2

2013

5.6

1977

2.5

2009

5.8

2002

5.0

2003

1.5

1972

3.2

1986

5.0

1991

4.7

2003

2.0

2003

4.2

2012

1.0

1984

2.5

1979

6.0

1974

4.2