Some data including the US price is taken from this article, so some prices in the chart are from 2018. Insulin is even more expensive these days based on more recent data
Insulin is seven to 10 times more expensive in the U.S. compared with other countries around the world. The same vial of insulin that cost $21 in the U.S. in 1996 now costs upward of $250. But it takes only an estimated $2 to $4 to produce a vial of insulin.