Is there someplace to see per-block stats, like how many block outputs are Inscriptions, or the percentage of block data?

Did BRC-20 and Inscriptions become possible at the same time?

FWIW, these seem to be the number of Inscriptions per month:
2022/12 3
2023/01 445
2023/02 218K
2023/03 444K
2023/04 2.03M (the pace picked up more on 4/22)
2023/05 7.66M
2023/06 3.99M
2023/07 6.45M
2023/08 6.83M
2023/09 7.28M
2023/10 1.81M
2023/11 8.34M
2023/12 7.64M

BTW, these things are ridiculous.