The Bureau's testing program for the 2010 Census relied principally on a small number of large-scale census-like tests. Specifically, the 2010 testing program included two national tests on the content of questionnaires in 2003 and 2005, two site tests focused on datacollection methods and systems in 2004 and 2006, and a final "dress rehearsal" at two sites in 2008. The dress rehearsal, considered to be the final step of a decade of research and testing, had the primary focus of testing automated field operations and their interfaces. The Bureau previously reported that implementing the census tests, including the dress rehearsal, cost about $108 million.