2013

6.1

2008

5.7

2023

6.3

2016

6.7

2022

6.3

2020

6.7

2003

6.2

7.8

1980

5.9

1968

6.9

1964

6.6

2020

6.3

6.1

1993

6.1

1972

6.9

2003

7.2

1987

7.5

1973

7.5

1999

6.3