"hundred" and "pretty" pronounced respectively as [ˈhən-dərd] and [ˈpər-tē]

Merriam-Webster’s A Pronouncing Dictionary of American English gives [ˈhən-dərd], [ˈpər-tē], [ˈtem-pə(r)-ˌchu̇r], [ˈse-kə(r)-ˌterē], etc., as alternate ways to pronounce “hundred,” “pretty,” “temperature,” and “secretary”?

My question is, in which parts of the English speaking world can one hear those words pronounced as such?