1935

7.3

1966

6.8

1979

4.7

2002

4.3

2003

5.1

1966

7.0

1962

7.0

1965

6.7

1971

6.4

1977

6.8

2005

6.7

1990

7.3

2003

5.5

1999

6.4

2001

5.8

2001

6.2

1994

5.2

1996

5.4

1966

6.0

1952

6.1