1990

6.5

2007

6.0

1994

5.7

1991

6.4

2005

7.8

1992

6.8

2018

7.0

2018

6.7

1990

6.5

1994

6.7

2011

7.0

2012

6.4

2017

7.5

1949

6.2

2020

5.8

1993

7.1

2002

7.7

2019

7.5

1993

5.4

2021

6.8