2021

6.2

2005

8.3

1975

4.5

2020

6.8

2015

6.4

5.0

2002

5.4

5.7

1964

7.4

2021

7.4

2019

6.2

2010

7.7

6.8

1973

6.1

1952

7.0

2012

8.0

2019

5.4

2014

4.9

1998

4.8

1989

6.2