| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $22,278 | $14,980 |
| 2016 | $22,754 | $14,779 |
| 2017 | $21,779 | $13,488 |
| 2018 | $21,779 | $13,884 |
| 2019 | $25,082 | $15,215 |
| 2020 | $25,940 | $16,073 |
| 2021* | $26,495 | $16,546 |
| 2022* | $27,062 | $17,032 |
| 2023* | $27,641 | $17,533 |
| 2024* | $28,233 | $18,048 |
| 2025* | $28,837 | $18,579 |
