1938

7.1

1959

6.9

1991

7.7

1998

7.9

1989

7.4

1984

6.3

1987

0.0

1970

7.2

1964

8.0

2008

5.8

1965

5.3

2002

7.0

1983

0.0

1965

6.5

1990

5.1

2010

7.6

2002

0.0

1984

6.5

1978

0.0

2011

6.3