1982

6.6

1970

7.5

2007

3.9

2004

6.2

1974

4.8

1990

4.6

1966

6.4

2007

7.6

1991

6.6

1966

6.0

1993

6.6

2005

5.4

1996

6.4

2016

0.0

2001

7.8

1980

7.3

1997

6.6

1999

6.3

2002

6.0

2020

5.0