1946

7.6

2000

6.9

1998

5.6

2006

6.7

1941

7.7

2002

7.2

1977

7.4

2017

6.0

2007

6.2

1986

8.0

1971

6.4

1977

6.8

1994

2.5

1999

5.6

1948

7.9

2004

6.6

2001

6.1

2005

6.7

1988

7.7

1996

7.4