led to a burst in 2020, and then diminished data collection and a flushed-out pipeline may led to a fall-off in 2021, below the expected pre-pandemic trendline.) In physics categories, <a href="#quant-ph_yearly">quant-ph</a> and <a href="#gr-qc_yearly">gr-qc</a> continued to grow, while the biggest fractional decline was mysteriously <a href="#physics_yearly">physics.app-ph</a>, and overall <a href="#phys_yearly">physics</a> had a slight decline from 2020. <a href="#math_yearly">math</a> had an even bigger 