2012

6.4

2007

5.7

2017

5.9

2018

6.5

5.4

2018

6.0

2011

5.7

2009

7.6

2022

5.6

2023

6.8

2012

7.2

5.0

1953

4.8

1982

5.8

6.4

1965

5.5

1975

4.5

1985

6.8