| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $20,350 | $14,094 |
| 2016 | $20,830 | $14,329 |
| 2017 | $21,832 | $15,420 |
| 2018 | $21,832 | $15,347 |
| 2019 | $22,750 | $15,719 |
| 2020 | $23,222 | $16,191 |
| 2021* | $23,770 | $16,583 |
| 2022* | $24,331 | $16,984 |
| 2023* | $24,905 | $17,395 |
| 2024* | $25,493 | $17,816 |
| 2025* | $26,095 | $18,247 |
