Regional differences, on the basis of the proportion of countries reporting implementation of various types of prevention programmes in the period 2002-2004, may be summarized as follows (the figures for the three types of intervention described above are averaged):
53. 根据报告在2002-2004年期间实施各类预防方案的国家的比例，各区域的差异可归纳如下（实施上述三种干预的平均数字）：