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# Occupation Workers 2010 Workers 2020 Earning
1 Cashiers, except gaming 3,550,000 171,990 Short‑term on‑the‑job training
2 Retail salespersons 4,489,200 162,690 Short‑term on‑the‑job training
3 ‑‑>Waiters and waitresses‑‑> 2,381,700 146,620 Short‑term on‑the‑job training