- 1951 – 418
- 1957 – 421
- 1962 – 440
- 1967 – 440
- 1971 – 451
- 1977 – 481
- 1980 – 485
- 1984 – 462
- 1989 – 471
- 1991 – 478
- 1996 – 403
- 1998 – 387
- 1999 – 369
- 2004 – 364
- 2009 – 376
- 2014 – 342
- 2019 – 397
(ECI)
Data Stories
(ECI)
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