- 1951 – 34
- 1957 – 31
- 1962 – 28
- 1967 – 43
- 1971 – 40
- 1977 – 49
- 1980 – 34
- 1984 – 66
- 1989 – 27
- 1991 – 51
- 1996 – 129
- 1998 – 101
- 1999 – 158
- 2004 – 159
- 2009 – 146
- 2014 – 182
- 2019 – 136
(ECI)
Data Stories
(ECI)
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