2006

6.7

1989

5.6

1994

6.2

1982

5.8

2019

6.7

1995

4.6

1979

6.1

1968

6.5

2006

6.3

2010

6.3

1988

7.4

2012

8.4

1999

6.0

2004

8.0

1987

7.4

1992

6.3

2010

7.7

2001

9.0

2003

7.2

1998

6.8