The biggest Census ever to be attempted in human history began today with President Pratibha Patil being the first to be enumerated in the decennial exercise. The 15th National Census exercise, which will see over 25 lakh officials capturing the socio-economic-cultural profile of India's 1.2 billion population will also seek information for the creation of the National Population Register. Mrs Patil appealed to all citizens of the country to wholeheartedly take part in the preparation of the first ever National Population Register after a delegation of the Census officials took down her information.<br/><br/>Later, Vice President, Mr. Mohd. Hamid Ansari, also enumerated by the staff of census commissioner of India. Speaking on the occasion Mr. Ansari said, this is a unique initiative, which will be completed on time.<br/><br/>Union Home Minister P Chidambaram, who was also present at the Rashtrapati Bhavan said, it is the first time in human history that 1.2 billion people are being provided I-cards after being identified, counted and enumerated.<br/><br/>The government has made it clear that no information will be collected on castes as no caste-based census has ever been conducted in independent India.