1985

7.0

1993

6.3

1979

5.6

2021

10.0

2010

6.5

2011

6.5

1989

5.0

2010

7.0

2009

7.4

2009

7.6

1981

6.1

2016

7.5

2016

6.8

1989

6.7

1977

7.7

2002

6.0

2003

7.5

2001

7.4

2005

7.8

1981

7.0