Well spotted. It's just two straight lines painted on top of the real graph.
Might be a fake chart.
https://www.macrotrends.net/global-metrics/countries/can/canada/net-migration Canada Net Migration 1960-2025 | MacroTrends
https://data.worldbank.org/indicator/SM.POP.NETM?locations=CA Net migration - Canada | Data
Well spotted. It's just two straight lines painted on top of the real graph.