| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $18,125 | $13,995 |
| 2016 | $18,490 | $14,339 |
| 2017 | $18,790 | $14,994 |
| 2018 | $18,790 | $14,867 |
| 2019 | $20,086 | $15,364 |
| 2020 | $22,876 | $18,154 |
| 2021* | $23,336 | $18,760 |
| 2022* | $23,805 | $19,387 |
| 2023* | $24,283 | $20,034 |
| 2024* | $24,771 | $20,704 |
| 2025* | $25,269 | $21,395 |