1972

4.8

1947

2.0

1985

0.0

1996

7.7

2007

7.9

2017

6.1

1997

7.4

1961

7.3

1963

7.0

1964

7.0

1959

7.8

2000

7.3

1971

6.8

2000

6.0

1990

7.0

1999

8.5

1995

8.0

1995

6.6

2006

6.7

1972

7.8