2001

7.4

1993

6.7

1960

7.5

1992

7.0

2006

7.4

1969

6.0

2002

6.5

2002

6.9

1999

6.5

1982

5.8

1999

6.2

1958

5.8

2008

7.0

2016

6.3

2003

7.3

1994

6.2

1978

4.6

1944

7.4

1994

7.1

2007

0.0