| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $21,446 | $13,977 |
| 2016 | $21,632 | $14,192 |
| 2017 | $22,064 | $13,928 |
| 2018 | $22,064 | $14,025 |
| 2019 | $24,158 | $15,134 |
| 2020 | $24,377 | $15,353 |
| 2021* | $24,599 | $15,576 |
| 2022* | $24,823 | $15,801 |
| 2023* | $25,049 | $16,031 |
| 2024* | $25,277 | $16,263 |
| 2025* | $25,507 | $16,499 |