1993

3.4

1988

2.5

1973

5.4

1983

3.7

1991

2.7

1979

6.1

2018

0.0

2009

4.5

2001

6.4

1986

5.3

2004

5.5

1977

6.6

2003

6.5

1987

6.6

2009

7.2

2004

5.6

2016

5.9

1994

6.2

1985

6.7

0.0