Cluster primes remain plentiful but slowly thinning at record heights: per-decade cluster fractions among odd primes are 3.18% in [1e7,1e8), 1.90% in [1e8,1e9), 1.16% in [1e9,1e10), 0.71% in [1e10,1e11), 0.448% in [1e11,1e12), 0.2849% in the now fully covered [1e12,1e13) (878,703,764 cluster primes), and 0.2411% in the covered stretch [1e13, 1.152e13) — consistent with the BES99 density-zero theorem and heuristic prediction of infinitude, on which this finite computation is necessarily silent.