| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,985 | $13,271 |
| 2016 | $17,985 | $14,487 |
| 2017 | $20,659 | $17,738 |
| 2018 | $20,659 | $19,418 |
| 2019 | $21,422 | $19,105 |
| 2020 | $22,270 | $19,953 |
| 2021* | $23,092 | $21,781 |
| 2022* | $23,944 | $23,776 |
| 2023* | $24,827 | $25,954 |
| 2024* | $25,744 | $28,331 |
| 2025* | $26,693 | $30,926 |