| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $17,650 | N/A |
| 2016 | $22,670 | N/A |
| 2017 | $24,580 | $19,897 |
| 2018 | $24,580 | $18,765 |
| 2019 | $23,270 | $17,925 |
| 2020 | $23,520 | $18,175 |
| 2021* | $23,772 | $17,361 |
| 2022* | $24,026 | $16,583 |
| 2023* | $24,283 | $15,840 |
| 2024* | $24,543 | $15,130 |
| 2025* | $24,806 | $14,453 |