1945

7.6

2014

6.8

2006

6.2

2000

6.7

1976

6.0

1969

7.4

1988

5.1

2006

5.9

2006

6.6

2001

6.7

1974

6.7

2016

6.2

1980

6.6

1982

6.4

1994

6.8

1994

7.1

1990

7.4

1998

7.7

1996

6.9

1999

7.7