1995

5.8

1991

0.0

2003

6.2

2006

5.5

1960

6.0

1932

6.9

2001

6.9

2007

6.1

1999

7.3

1995

6.3

2001

6.1

2002

0.0

1984

0.0

2008

7.6

2005

4.9

1975

0.0

1971

7.4

2015

5.7

1963

6.3

1989

0.0