1976

6.2

1994

6.7

1998

4.6

0.0

2000

6.1

1993

6.1

1995

5.3

2018

5.7

1999

6.9

2002

6.7

2004

7.1

1982

8.1

1957

6.7

1981

3.1

1993

6.2

1994

6.4

1997

6.0

1962

5.0

2005

4.5

1998

6.8