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

I'm curious to know, how prevalent is it for individuals to have amassed a million dollars or more in retirement savings? Given the ever-evolving financial landscape and the varying financial strategies employed by different demographics, it's intriguing to contemplate the scale of those who have achieved this milestone. Do a significant portion of the population possess such substantial nest eggs, or is this a rarity among the broader retirement planning community? Understanding the answer to this question could offer valuable insights into financial trends and the success of various retirement planning methods.