2006

7.5

2018

6.6

2018

6.3

1988

7.4

1964

5.6

2002

5.9

1992

6.5

1959

4.6

1996

5.9

2011

6.2

1971

5.5

1983

5.5

1973

7.0

2001

7.6

2010

6.6

2011

8.1

1960

7.2

2009

7.6

1960

7.1

1956

5.9

2002

7.6

1998

1.0

1990

0.0