1982

5.5

1991

7.5

2006

7.8

2013

5.9

1990

7.7

2005

7.1

2016

4.8

2001

6.5

1991

6.8

1984

5.9

1972

7.6

1953

6.5

2001

7.7

2004

7.3

2007

4.7

2008

6.3

1984

6.9

1954

9.2

2016

4.5

2016

6.5