1997

6.6

2019

6.4

1982

5.2

2007

6.5

1988

6.1

2018

6.3

2018

6.4

1981

7.3

2009

7.7

2022

7.4

2018

6.3

2016

7.5

2018

6.2

2015

7.6

1990

5.8

2019

7.7

2019

7.8

1999

5.1

2024

7.2

2018

6.9