In 8.8.b0:

less than 1 : 33
less than 2 : 54
less than 4 : 80
less than 8 : 92
less than 16 : 99
less than 64 : 102

and the worst 15 are

['src/sage/combinat/root_system/weyl_group.py # 7 doctests failed',
'src/sage/groups/perm_gps/permgroup.py # 7 doctests failed',
'src/sage/libs/ntl/ntl_ZZ_pX.pyx # 8 doctests failed',
'src/sage/numerical/backends/cvxopt_backend.pyx # 8 doctests failed',
'src/sage/numerical/sdp.pyx # 8 doctests failed',
'src/sage/misc/nested_class.pyx # 9 doctests failed',
'src/sage/rings/integer.pyx # 9 doctests failed',
'src/sage/symbolic/expression.pyx # 9 doctests failed',
'src/sage/graphs/generic_graph.py # 10 doctests failed',
'src/sage/symbolic/constants.py # 12 doctests failed',
'src/sage/combinat/cluster_algebra_quiver/cluster_seed.py # 13 doctests failed',
'src/sage/combinat/cluster_algebra_quiver/quiver.py # 13 doctests failed',
'src/sage/matroids/matroid.pyx # 18 doctests failed',
'src/sage/combinat/finite_state_machine.py # 19 doctests failed',
'src/sage/misc/classcall_metaclass.pyx # 20 doctests failed']