2011

7.1

1980

6.8

1975

6.8

2004

9.9

2020

5.7

1982

5.2

1979

6.6

1995

7.7

1980

7.0

1987

5.3

1996

6.9

1977

5.7

1960

7.7

1967

6.1

2002

9.1

2001

7.0

1991

5.9

1989

5.8

1953

7.3

1968

7.1