导师叫我找unemployment rate by educational level, 我已经找了1周了，完全无信息啊。。。。急死人了！求帮助

最近在一篇文章看到:"In this paper, we use a four year nationwide sample data set, that is CNPC2000, CHIP2002, 1%SPC2005 and CHIP2007, to examine employment status of graduates of different school levels.:" 想问问各位高手,CNPC, CHIP SPC的数据是在哪里找的啊？