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The line in the source
Before 2019, production averaged 1.5 to 2 billion cards a year.
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Record
1.5-2 Before 2019
EstimateOur model or estimate. Treat it as an order of magnitude.
Found in one pass only. The research team reads every source twice, independently; this record turned up in one reading but not the other, so treat it as less certain than its grade.
The line in the source
Before 2019, production averaged 1.5 to 2 billion cards a year.
Built from this one