2000

6.9

2002

7.1

2008

7.6

1996

7.1

2010

7.9

2013

7.9

2002

8.6

1987

7.1

2003

7.8

1992

6.0

2017

0.0

2021

6.7

1996

8.7

2001

6.0

1986

8.0

2006

7.8

1991

6.0

2002

7.8

1975

6.4

1976

6.0