1989

5.2

2003

5.7

1986

5.8

2003

6.3

2012

6.5

2003

6.2

2005

6.3

2009

6.0

1980

6.3

2011

5.9

1987

4.1

2006

6.1

1987

5.7

1979

7.3

1994

4.6

2004

7.9

1962

7.6

2021

9.2

2013

5.6

2012

6.3