1998

6.9

2002

7.1

2006

7.2

2003

7.2

2004

7.8

1962

7.6

2017

5.7

1968

6.0

2002

6.2

2005

7.6

1978

5.8

1994

6.4

1938

2.3

2000

5.8

2006

5.3

2005

5.0

1988

6.3

1969

6.7

1969

6.9

1982

0.0