1998

7.9

2007

6.6

2013

7.9

2006

7.4

1972

6.5

1976

0.0

1999

6.5

1996

7.3

2006

6.9

1992

7.5

1995

7.3

2019

8.0

1967

7.7

2021

6.7

2014

6.7

2020

8.1

1990

8.3

2002

7.5

1991

7.8

2015

6.8