1992

5.5

1954

6.2

1965

4.6

1960

6.7

1971

6.1

2005

2.4

1986

5.3

1964

6.6

1962

6.5

1968

3.9

2004

8.4

2006

6.7

1932

7.3

2001

7.8

1988

7.0

1967

7.6

2013

7.0

2000

5.8

2005

4.9

2005

4.4