SIPRI military expenditure data are entirely based on open sources and, as far as possible, on official data.
The SIPRI definition of military expenditure is used as a guideline in the compilation of SIPRI data but is not always possible to apply. If another definition is used, it is applied over the entire country time-series in order to achieve consistency over time.
Local currencies are converted to constant US dollars using the domestic consumer price index and the market exchange rate.
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