| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $16,273 | $11,228 |
| 2016 | $17,327 | $13,049 |
| 2017 | $19,221 | $17,141 |
| 2018 | $19,221 | $17,128 |
| 2019 | $21,228 | $17,101 |
| 2020 | $22,420 | $18,293 |
| 2021* | $23,873 | $19,568 |
| 2022* | $25,420 | $20,932 |
| 2023* | $27,067 | $22,391 |
| 2024* | $28,821 | $23,952 |
| 2025* | $30,689 | $25,621 |
