2015

7.1

1987

0.0

1990

7.7

2005

7.1

2016

3.5

1991

5.5

2020

8.2

1997

6.1

2004

5.6

2017

6.8

1973

7.5

1968

0.0

1982

5.0

2006

6.7

1993

0.0

1959

6.9

2000

6.4

1950

5.9

1956

5.1

1963

5.7