2007

7.7

2006

8.3

1997

7.4

1964

7.2

2007

7.9

2002

7.4

1993

5.1

1975

7.4

2004

7.8

1961

7.7

1990

7.6

1979

5.0

2009

7.5

2015

7.5

2015

7.8

1966

7.6

1985

7.7

2005

0.0

1981

7.1

1965

7.9