1999

8.0

2000

7.9

2020

0.0

2021

6.0

8.0

2015

5.7

2016

0.0

2016

7.7

1957

6.0

2007

6.5

1996

7.0

2002

5.9

1971

7.6

2004

7.4

2000

7.6

1998

8.3

1987

7.3

1959

8.0

1989

7.2

1999

7.7