1993

6.1

1980

6.3

7.8

2015

7.4

2024

7.3

2017

6.0

2010

7.1

2021

7.7

2017

6.1

2022

6.3

2013

6.1

1999

8.4

1965

6.8

1970

7.3

6.1

1957

8.1

2000

5.1

1978

6.9

1928

8.0

1973

7.6