7.8

2015

7.4

2024

7.3

1996

7.8

1993

6.1

2024

5.0

2008

4.6

2009

6.2

2001

7.2

1999

8.4

1968

6.3

1982

6.3

1980

6.7

2000

5.1

1972

7.5

1982

5.8

2011

7.5

2012

6.4

2013

6.7

2021

5.5