| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $33,230 | $24,546 |
| 2016 | $34,194 | $26,175 |
| 2017 | $33,965 | $23,969 |
| 2018 | $33,965 | $27,150 |
| 2019 | $36,615 | $26,016 |
| 2020 | $37,272 | $26,673 |
| 2021* | $37,939 | $27,348 |
| 2022* | $38,618 | $28,040 |
| 2023* | $39,310 | $28,749 |
| 2024* | $40,013 | $29,476 |
| 2025* | $40,729 | $30,222 |