2005

4.9

1967

6.5

1982

4.2

2004

7.5

2001

7.5

2008

4.1

1963

7.5

1959

6.2

1977

8.1

2011

6.6

1967

7.2

1964

5.0

2016

6.0

1977

6.4

2000

5.0

1968

5.6

2013

5.9

1990

7.7

1979

6.3

1987

3.7