Static data update

[jzhu20]

Feature request description

We need to update data in healthgps-data. Data source is UNDB, IHME, IARC(International Agency for Research on Cancer).

Describe the solution you'd like

An audomatic update from the data sources.

Describe alternatives you've considered

NA

Additional context

Detailed data source:
• Data are freely available in the UN database for most countries from 1950 until 2100. We downloaded births, deaths, total population, and net migration for all countries by age and sex. https://population.un.org/wpp.
• IHME database (Institute for Health Metrics and Evaluation) provides prevalence, incidence, mortality and remission rates for most diseases and countries.
• IARC database ([International Agency for Research on Cancer)] (http://oecdpublichealthexplorer.org/ncd-doc/zreferences.html#id55) provides prevalence at 1, 3 and 5 years, incidence, and mortality rates for cancers.