1992

1.0

1973

5.2

1977

3.8

2001

3.5

2002

3.7

1999

3.0

1970

3.8

1989

3.7

1996

3.7

1995

2.0

1995

1.2

2014

3.2

1993

3.3

2015

5.1

2005

3.6

1980

3.4

1981

4.1

1983

7.0

1979

5.3

1999

4.2