| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,090 | $12,628 |
| 2016 | $19,698 | $13,995 |
| 2017 | $20,264 | $14,230 |
| 2018 | $20,264 | $14,274 |
| 2019 | $22,750 | $15,985 |
| 2020 | $22,886 | $16,121 |
| 2021* | $23,543 | $16,392 |
| 2022* | $24,219 | $16,667 |
| 2023* | $24,914 | $16,947 |
| 2024* | $25,629 | $17,232 |
| 2025* | $26,364 | $17,521 |
