<Table> <Tr> <Th_colspan="2"> Academy Award for Best Animated Feature </Th> </Tr> <Tr> <Th> Awarded for </Th> <Td> The best animated film with a running time of more than 40 minutes, a significant number of the major characters animated, and at least 75 percent of the picture's running time including animation . </Td> </Tr> <Tr> <Th> Country </Th> <Td> United States </Td> </Tr> <Tr> <Th> Presented by </Th> <Td> Academy of Motion Picture Arts and Sciences (AMPAS) </Td> </Tr> <Tr> <Th> First awarded </Th> <Td> 2001 (for Shrek) </Td> </Tr> <Tr> <Th> Currently held by </Th> <Td> Coco (2017) </Td> </Tr> <Tr> <Th> Website </Th> <Td> oscars.org </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Academy Award for Best Animated Feature </Th> </Tr>

When was the best animated feature film category first introduced