1997

6.2

1999

7.8

2003

6.7

2004

6.4

2020

5.5

2020

4.8

2015

6.8

2018

7.5

2023

5.7

2014

7.4

1969

5.7

2012

9.3

1959

7.8

1967

7.4

1996

7.3

1985

7.8

2019

6.1

2019

6.1

1933

6.6

1997

8.2