How many NOTA votes were polled in past Lok Sabha elections?

In the 2019 Lok Sabha elections, as many as 65,22,772 NOTA votes were polled, which constituted 1.06% of the total number of votes. The highest number of NOTA votes were cast in Bihar (8,16,950). Meanwhile, in the 2014 Lok Sabha elections, as many as 60,02,942 NOTA votes were cast.