1990

6.9

2001

7.3

2003

7.1

2002

6.2

2002

7.1

2004

6.3

1969

0.0

1997

6.0

1959

4.2

1973

3.5

2008

7.6

1999

7.0

2006

7.1

1985

7.7

2006

6.6

2019

6.7

1981

7.5

1952

5.6

2014

6.8

1992

6.6