2000

6.6

1975

7.0

2001

7.8

2006

8.6

1998

7.1

2008

8.9

1982

7.6

2012

6.3

2004

8.1

1982

7.5

2008

7.6

2023

7.6

1989

8.3

1972

7.9

2019

7.3

2019

8.7

1986

8.4

2016

8.0

1989

8.2

2013

8.0