Closed Access Embargo Open Access Restricted Unknown Total
Total 66 10 653 222 770
2024 1 - 1 - 2 4
2023 10 2 117 19 94 242
2022 7 2 139 41 108 297
2021 16 2 145 38 138 339
2020 21 3 131 63 204 422
2019 11 1 120 61 224 417