How many trillionaires are there in the world?

Can you please provide me with an updated figure on how many individuals in the world currently hold a net worth exceeding one trillion dollars? I'm particularly interested in knowing if there have been any notable changes in the number of trillionaires over the past few years, and if so, what factors might have contributed to such changes. It would also be helpful to understand the industries or sectors that these trillionaires are primarily associated with. Thank you in advance for your insights.