1999

7.7

2002

8.4

1993

8.6

1955

7.3

1956

7.1

1957

7.1

2000

7.4

1987

7.6

1990

8.5

2005

7.9

2020

4.0

1971

0.0

1985

0.0

2017

6.6

1984

7.5

2020

7.5

1981

4.0

2017

6.1

2001

6.2

2025

0.0