2004

6.5

1982

7.5

1994

6.2

2005

6.3

1974

8.6

1990

7.4

2003

7.2

1971

7.2

2007

6.2

1985

6.7

2014

4.6

1969

6.8

1959

7.9

2003

8.3

2007

6.7

1995

6.5

2006

7.9

1997

7.0

2021

6.0

2000

6.0