| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $40,217 | $21,475 |
| 2016 | $42,336 | $21,547 |
| 2017 | $43,837 | $21,906 |
| 2018 | $43,837 | $21,501 |
| 2019 | $46,754 | $23,185 |
| 2020 | $46,929 | $23,360 |
| 2021* | $48,595 | $23,535 |
| 2022* | $50,320 | $23,712 |
| 2023* | $52,106 | $23,890 |
| 2024* | $53,956 | $24,069 |
| 2025* | $55,872 | $24,249 |