Input (grade 13): In 1926 it became the capital of Niger, and the population gradually increased, from about 3,000 in 1930 to around 30,000 in 1960, 250,000 in 1980 and - by some estimates - 800,000 in 2000.
Output (grade 6): In 1926, it became the capital of Niger. The population grew slowly from about 3,000 people in 1930 to around 30,000 in 1960, 250,000 in 1980 and 675,000 in 2002.