1990

7.4

2002

7.1

2024

7.7

1987

8.1

1974

8.6

1977

8.2

1972

8.7

1999

8.4

1957

8.5

2009

7.6

1997

7.9

1994

8.7

2008

8.5

2016

7.6

2014

8.5

2012

7.8

2024

6.9

2015

8.0

1987

7.8

1989

8.3