Birmingham's population has experienced significant growth and changes since 1825.
1) Birmingham's population grew rapidly in the 19th century during the Industrial Revolution as people moved to the city for work in new industries.
2) The population peaked at around 1.15 million in 1950 before declining between 1950 and 2000 during a period of deindustrialization and globalization that closed factories and increased unemployment.
3) Since 2000, Birmingham's population has grown again due to new developments like the Bull Ring and improved transport links like High Speed 2 rail.