1982

7.9

1994

7.3

1990

7.7

2001

6.7

2019

6.5

2005

7.6

1999

7.2

2016

6.6

1988

7.4

2016

6.8

2023

8.3

2000

7.1

1971

8.2

1994

8.7

2014

7.7

2014

8.5

2010

8.4

2016

7.9

1996

7.9

1985

8.3