1969

7.8

2008

7.6

2023

10.0

2011

7.6

1984

8.4

1982

7.6

2009

7.7

1989

8.3

1989

6.0

2021

8.1

2014

6.6

2016

6.9

1973

6.8

2005

8.6

1984

7.8

2002

8.6

1998

7.0

1995

7.0

2007

7.4

2015

7.7