The results are attributed to the IOC country code as currently displayed by the IOC database. Usually, a single code corresponds to a single National Olympic Committee (NOC). When different codes are displayed for different years, medal counts are combined in the case of a simple change of IOC code (such as from HOL to NED for the Netherlands ) or simple change of country name (such as from Ceylon to Sri Lanka ). As the medals are attributed to each NOC, not all totals include medals won by athletes from that country for another NOC, such as before independence of that country (see individual footnotes for special cases such as combined teams). Names in italic are national entities that no longer exist. The totals of NOCs are not combined with those of their predecessors and successors.