1988

7.1

1968

2.7

2001

5.1

1968

7.6

1976

5.6

2018

4.4

1975

5.5

2006

7.4

2003

7.8

1977

5.5

1969

6.4

1984

1.0

1997

1.8

2007

5.9

2004

3.7

2014

6.0

2009

7.5

1995

4.6

1997

0.0

1993

7.8