How many Buddhism believers are there worldwide in 1990's?

In the 1990s, it was estimated that there were approximately 350 to 500 million Buddhists worldwide. This number varied due to differing definitions of who qualifies as a Buddhist and the challenges of accurately counting adherents in various regions. The largest populations of Buddhists were found in countries like China, Japan, Thailand, and Myanmar. Overall, Buddhism continued to grow during this decade, particularly in Western countries.