How many tigers were there during 1980, 1990, 2000, 2010, 2016 ?

Tigers once ranged widely across Asia, from Turkey in the west to the eastern coast of Russia. Over the past 100 years, they have lost 93% of their historic range, and have been extirpated from southwest and central Asia, from the islands of Java and Bali, and from large areas of Southeast and Eastern Asia. Today, they range from the Siberian taiga to open grasslands and tropical mangrove swamps. The remaining six tiger subspecies have been classified as endangered by IUCN. The global population in the wild is estimated to number between 3,062 and 3,948 individuals, down from around 100,000 at the start of the 20th century, with most remaining populations occurring in small pockets isolated from each other, of which about 2,000 exist on the Indian subcontinent. A 2016 global census estimated the population of wild tigers at approximately 3,890 individuals. Major reasons for population decline include habitat destruction, habitat fragmentation and poaching. The extent of area occupied by tigers is estimated at less than 1,184,911 km²(457,497 sq mi), a 41% decline from the area estimated in the mid-1990s. In 2016, wildlife conservation group at WWF declared that world's count of wild tigers has risen for the first time in a century.
This is from WIKIPEDIA...
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