| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $29,544 | N/A |
| 2016 | $29,004 | N/A |
| 2017 | $28,626 | $26,701 |
| 2018 | $28,626 | N/A |
| 2019 | $28,284 | $22,165 |
| 2020 | $25,041 | $18,922 |
| 2021* | $24,715 | $16,154 |
| 2022* | $24,394 | $13,790 |
| 2023* | $24,077 | $11,773 |
| 2024* | $23,764 | $10,051 |
| 2025* | $23,455 | $8,580 |
