| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $28,259 | $20,098 |
| 2016 | $29,268 | $20,812 |
| 2017 | $30,069 | $21,497 |
| 2018 | $30,069 | $21,202 |
| 2019 | $31,793 | $22,276 |
| 2020 | $32,168 | $22,651 |
| 2021* | $33,049 | $23,396 |
| 2022* | $33,955 | $24,166 |
| 2023* | $34,885 | $24,961 |
| 2024* | $35,841 | $25,782 |
| 2025* | $36,823 | $26,630 |