1991

3.6

2003

5.7

2017

5.5

2008

5.2

2016

7.2

1959

8.1

2009

6.6

1999

7.6

1986

6.6

1981

7.8

2012

7.0

2002

4.6

1984

6.3

2024

6.7

2023

7.5

1984

5.5

2007

9.7

2022

7.8

1967

6.2

1974

6.5