1996

7.8

2006

7.4

2011

8.1

2010

7.9

2013

7.9

2006

0.0

2004

6.1

2003

8.5

1999

7.0

1985

4.1

2000

5.8

1991

7.7

1977

5.0

2020

6.8

1977

0.0

1998

5.0

1996

6.7

2019

8.5

2013

7.1

2000

8.1