2007

6.8

2010

6.9

2021

7.6

1977

7.1

2017

6.3

2019

7.0

1963

7.7

2019

6.6

1968

7.5

2019

8.3

2018

7.4

2018

7.0

2019

5.9

2009

4.1

2020

6.6

2018

6.7

1968

7.1

2019

6.6

2019

6.8

2000

7.2