According to this report, 760.000 Iranian participated in the 2021 lottery.
Recently the number of Registration in the US Diversity Program 2021 has been announced:
From 2010 through 2017 and 2018, the number of
Iranians who registered for the lottery grew steadily. In 2018, it reached the
highest number, when nearly 1,600,000 people registered.
The rise slowed after President Donald Trump
imposed immigration restrictions on seven primarily Muslim countries in 2017.
In the years under review, 2019 had the most massive drop.
After the years of Biden's presidency, the trend of this chart increased again, and it appears that the slight drop in 2019 is also related to the corona pandemic and visa restrictions.
According to
this report, 760,000 Iranian participated in the 2021 lottery.
The following chart shows the process of registering Iranian in the lottery in the last ten years: