2005

8.2

1995

5.4

2020

7.6

1984

6.8

2003

7.8

2002

6.5

2010

7.9

2000

7.6

2002

8.6

2006

7.8

2005

7.8

1987

7.1

1994

7.6

1975

7.2

2018

6.8

2018

7.3

2013

7.4

2014

6.8

1994

7.2

1982

6.3