They are collected by individual national statistics authorities who each have their own methods of collecting and collating information.
As for the individual usage statistics, these were much lower than I expected.
However, major crashes - such as the high-speed collision in Eschede, Germany, which killed more than 100 - can distort the statistics for individual years.
Individual talent and performance statistics like overall scoring disparity, team batting average, home runs or a pitching staff's earned run average are given no weight at all.
Experts say the sort of exact estimates attributed to the Beijing Weather Modification Office official by Xinhua -- 16 million tons of extra snow -- is nearly impossible to make for any individual storm, although statistics gathered painstakingly over years can enable estimates of the effectiveness of longer-term efforts.
Baseball teams keep statistics on each individual player so they can tell who is helping the team and who is hurting them.
It is that cancer often deviates wildly from the averages, so much so that merely applying the general statistics to an individual patient can often turn out to be downright misleading.
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Statistics covering the performance of individual hospitals and health authorities will be released later this month.
Another exciting open data announcement came from the U.S. Census Bureau which updated its popular QuickFacts site with the new American Community Survey statistics (about 11 billion individual estimates), providing access to information about a town, county or state.
Instead of the prior emphasis on rates of fatal accidents, experts have started to talk publicly about statistics that highlight a much tougher standard: individual fatalities per millions of flights.
That system included the likelihood the person would repay or default on a loan based on statistics rather than the judgment of a loan officer or individual lender.
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If Elton Mayo's Hawthorne results still hold good, all the attention being bestowed upon the individual worker might of itself be enough to bring about a productivity boost that even the foggy radar of economic statistics can pick up.
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