| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,926 | $10,093 |
| 2016 | $19,203 | $10,589 |
| 2017 | $19,827 | $11,419 |
| 2018 | $19,827 | $11,897 |
| 2019 | $20,512 | $12,476 |
| 2020 | $20,825 | $12,789 |
| 2021* | $21,144 | $13,412 |
| 2022* | $21,467 | $14,065 |
| 2023* | $21,796 | $14,750 |
| 2024* | $22,129 | $15,468 |
| 2025* | $22,468 | $16,222 |
