户口普查 meaning in Chinese

census
general household survey

The population of china was about 450 , 000 , 000 at the last census
上次户口普查，中国人口大约四亿五千万。
When mary was close to birth , the government ordered everyone to return to their hometowns for a census
当玛丽即将生产时，政府命令每个人都要回到家乡做户口普查。
Herman hollerith gets a contract for processing the 1900 census data using punched cards . his firm was eventually named ibm in 1924
赫尔曼.霍尔瑞斯得到一份合同，采用穿孔卡片处理1900份户口普查资料。 1924年，他的工厂最终被冠名为ibm 。