- 1951 – 53
- 1957 – 15
- 1962 – 27
- 1967 – 25
- 1971 – 53
- 1977 – 34
- 1980 – 36
- 1984 – 35
- 1989 – 113
- 1991 – 145
- 1996 – 209
- 1998 – 176
- 1999 – 169
- 2004 – 230
- 2009 – 363
- 2014 – 464
- 2019 – 673
(ECI)
Data Stories
(ECI)
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