| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $26,506 | $18,111 |
| 2016 | $26,894 | $17,999 |
| 2017 | $27,538 | $18,495 |
| 2018 | $27,538 | $18,136 |
| 2019 | $29,030 | $20,129 |
| 2020 | $27,118 | $18,217 |
| 2021* | $27,514 | $18,104 |
| 2022* | $27,916 | $17,992 |
| 2023* | $28,323 | $17,880 |
| 2024* | $28,737 | $17,769 |
| 2025* | $29,156 | $17,659 |
