Sanitation is fundamental to human development. Safely managed sanitation services can reduce diarrheal disease, and can significantly lessen the adverse health impacts of other disorders.

Using data from the WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene obtained through the World Bank Open Data, I created a chart below about the indicator “people using at least basic sanitation services (as a percent of the population)” for 191 countries around the world from 2000 to 2017.

How to read the chart

Each circle represents one country. The 191 countries are categorized into four income groups based on the Gross National Income (GNI) per capita in 2018. The X-axis indicates the percentage of the country’s population that uses at least basic sanitation services. The density estimates are drawn for each group and reflect the distribution of countries.

As the year progresses, the circles move along the X-axis. The color of the circle indicates whether the indicator in that country has decreased, stayed the same, or increased from 2000 to 2017. As the circles move, the distribution of countries reshapes.