2009

6.6

1989

7.5

1996

6.9

2013

8.0

2014

8.4

1990

7.4

1985

7.2

2012

7.2

1980

8.2

2001

7.9

2010

7.1

1993

7.5

2001

8.5

2014

8.0

2019

7.8

1988

8.1

2004

7.9

1998

6.8

1977

8.2

1958

8.2