1960

8.4

1979

7.8

1997

8.4

2021

5.9

1988

6.3

1964

5.9

1978

5.0

2007

5.8

1998

7.2

2016

6.4

2026

0.0

2013

0.0

2001

7.8

1980

7.3

1997

6.6

1999

6.3

2002

6.0

2000

6.5

2013

5.1

1970

7.0