1950

6.2

2008

6.1

2009

6.9

2007

7.0

2006

6.8

2018

4.9

1948

7.9

2005

6.6

1988

7.7

1996

7.4

2005

5.6

2018

7.2

1999

5.4

2006

7.0

1970

5.0

2024

10.0

1937

6.3

1980

6.2

1970

7.1

1999

5.8