2010

7.0

2005

6.8

1988

5.2

1995

7.9

1968

6.8

1989

4.7

2006

5.5

2019

6.7

1998

6.0

2005

7.3

1997

5.6

1990

6.0

2012

4.4

2008

6.4

1969

5.1

2008

6.3

1996

5.5

1989

6.1

2010

6.9

1985

6.4