1959

6.7

1964

6.8

1989

6.2

1982

5.2

1996

6.4

1988

6.6

1987

6.0

2018

0.0

1997

6.1

1964

7.5

2007

6.7

1920

0.0

1927

0.0

2014

5.3

1981

6.1

1989

6.3

1978

7.4

2016

7.0

2003

5.9

1986

6.6