2002

5.3

1995

7.3

2000

3.4

1997

5.7

2014

6.3

1973

7.5

1994

6.1

2007

7.6

1987

6.0

1968

4.2

1999

0.0

2001

5.9

2006

6.5

1974

6.7

1987

6.5

2016

6.8

1968

6.3

2007

5.5

2001

6.0

2016

7.0