Gs 13 us July 8, 2019 16 32 64 128 Gs 13 usajobs Gs 13 usa Gs 13 usda Gs 13 uspto Gs 13 usaf Gs 13 rest of us 2024 Gs 13 rest of us Gs 13 rest of us 2025 Gs 13 rest of us 2023 Usda gs 13 pay scale Usaid gs 13 pay scale