1960

7.5

2006

7.0

2003

7.0

1991

7.5

2006

7.4

1995

6.5

2004

6.6

1982

6.4

2001

7.9

2003

6.6

1965

6.7

1962

7.9

1953

7.3

1973

7.4

1994

5.2

1966

5.7

1970

7.1

1964

7.5

2004

7.8

1993

7.7