Thank you. This is the perfect example of an anecdote. Walmart, the largest employer in the US at 2.2mm employees. Guess who FMLA benefits don't apply to? Small businesses (<50 employees) and part-time employees. Guess who is the biggest part-time employer?

And know I don't have numbers. Other countries have created a uniform referable benefits baseline that companies are required to provide. For me to answer your question I would need to interrogate every US company. There are research companies that do exactly that, I would need to pay for their answers.