Here is data tracking the world absolute poverty rate from 1820 to 2015. The data shows vast improvement in the reduction of absolute poverty( living on less than US$1 per day in 1996).
People are considered to live in extreme poverty at a consumption (or income) level below 1.90 international-$ per day. International $ are adjusted for price differences between countries and for price changes over time (inflation).
The highest absolute poverty rate in the world today is Madagascar at 81.8% living on less than $1.90 per day (US$1 per day in 1996) This is about the overall world level of absolute poverty 100 years ago.