2003

5.3

2009

6.3

1981

7.0

1987

6.8

2002

7.2

2006

5.6

2003

6.7

2003

6.3

2019

4.5

1994

6.3

1972

6.8

1993

5.3

1969

6.8

1970

6.9

2016

2.6

2008

6.5

2008

6.3

1995

6.1

2002

6.0

1996

6.1