1969

6.4

2007

7.7

2020

6.0

2019

9.8

2014

5.6

2023

9.2

1990

6.3

2009

6.2

2013

5.9

1968

6.4

2015

8.3

1976

4.8

1971

6.6

2003

5.4

2014

8.5

1990

4.4