2002

5.3

1991

6.2

1999

6.8

1997

7.8

1997

6.8

1993

5.0

1978

7.2

1991

6.7

2006

5.8

2007

7.4

1994

5.9

1969

7.8

1946

6.0

1956

6.2

2007

6.3

2002

7.4

0.0

1998

0.0

1967

7.8

2017

7.0