| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $23,445 | $14,209 |
| 2016 | $23,932 | $14,056 |
| 2017 | $25,659 | $15,129 |
| 2018 | $25,659 | $15,088 |
| 2019 | $28,602 | $16,927 |
| 2020 | $29,336 | $17,661 |
| 2021* | $30,090 | $18,427 |
| 2022* | $30,863 | $19,227 |
| 2023* | $31,656 | $20,062 |
| 2024* | $32,470 | $20,932 |
| 2025* | $33,304 | $21,841 |