Depending on the source of information, the number of new Israeli Olim (immigrants) in the 12 months prior to Yom Ha’Atzmaut was 38,000 (Jewish Agency) or 42,675 (Ministry of Immigration and Absorption). Either way, it was the highest level for two decades. Most came from Russia and Ukraine.
https://www.jns.org/ahead-of-israels-74th-birthday-immigration-smashes-20-year-record/