1991

7.0

2021

7.1

1993

6.0

2009

7.6

2018

7.5

1968

6.9

2000

6.3

1990

7.2

2002

7.2

2011

8.3

2023

4.8

2013

5.7

2008

7.8

2015

7.9

1998

6.0

1964

7.4

1988

7.5

2009

5.9

2017

8.1

1988

7.4