1989

4.6

1975

6.3

2010

7.0

1996

7.5

1984

6.2

2010

4.8

2014

5.0

1989

6.2

2018

5.3

2007

5.5

1987

3.8

1994

4.5

1953

6.2

2003

5.3

2001

5.5

1963

6.0

2005

5.1

2014

5.8

2014

5.2

2007

7.1