| Year | Total Expenses | Average Net Price |
|---|---|---|
| 2015 | $56,133 | $53,183 |
| 2016 | $56,646 | $48,303 |
| 2017 | $50,353 | $42,814 |
| 2018 | $50,353 | $40,224 |
| 2019 | $51,660 | $43,486 |
| 2020 | $53,185 | $45,011 |
| 2021* | $53,669 | $42,288 |
| 2022* | $54,157 | $39,729 |
| 2023* | $54,650 | $37,326 |
| 2024* | $55,148 | $35,068 |
| 2025* | $55,649 | $32,946 |