One problem with that chart is that the years 2022 and 2023 are predictions with the centroid being about 10.5 million births (5.5 million male and 5 million female). But we now have the actual numbers which have been reported as 9.56 million in 2022 and 9.02 million in 2023.
That’s about at the 95% low prediction limit. Covid made predictions hard.