Task: Question Generation
Input (English): Passage: This article is about the demographic features of the population of Lebanon, including population density, education level, health of the populace, economic status, religious affiliations and other aspects of the population. About 99% of the population of Lebanon includes numerous Muslim sects and Christian denominations. Because the matter of religious balance is a sensitive political issue, a national census has not been conducted since 1932, before the founding of the modern Lebanese state. Consequently, there is an absence of accurate data on the relative percentages of the population of the major religions and groups. The absence of data and comprehensive statistics concerns also concerns all other demographic studies unrelated to religious balance, due to the all but total inactivity of the concerned public agencies. The only recent  statistics available are estimates based on studies made by private organizations. There are from 8.6 to 14 million Lebanese and descendants of Lebanese worldwide. The biggest study made after the independence on the Lebanese Population was made by the Central Administration of Statistics  under the direction of Robert Kasparian and Mgr. Grégoire Haddad's Social Movement: "L'enquête par sondage sur la population active au Liban en 1970". It was conducted on a sample of 130,000 individuals.
Output (English): How many years after the last census was conducted before the modern Lebanese state was a study made after the independence on the Lebanese Population by the Central Administration of Statistics?