2003

7.9

2015

7.9

2007

7.6

2004

7.9

1994

7.8

1999

8.2

1993

7.7

2015

7.2

2018

7.0

2014

7.9

1979

6.7

2001

7.6

2001

7.2

1992

6.7

1992

5.9

2003

7.6

1993

7.0

2000

8.0

2010

7.5

1989

8.3

1991

6.3

1998

7.1

2021

6.8