How many people have $1,000,000 in savings?

Could you elaborate on the demographics and financial status of individuals who possess a savings of $1,000,000 or more? Are these individuals primarily from high-income professions, or do they come from a diverse range of backgrounds? What percentage of the global population falls into this category, and how has this figure changed over time? Additionally, what are the common strategies employed by these individuals to accumulate such significant savings?