remaining classes which probably aren't needed for bootstrapping...
(updated sporadically)

BlockCannotReturn                      180           0             0
CharacterSet                           753           3            36
ClassOrganizer                        2344          25           700     0.2
Error                                   53           0             0
Exception                             1260           0             0
ExceptionMarker                        238           0             0
ExceptionSet                           224           0             0
Exhaustion                               0           0             0
Float                                 4638          74           888     0.2
Fraction                              1366           0             0
Halt                                    72           0             0
InstructionStream                     2584           0             0
LargeNegativeInteger                   395           0             0
LookupKey                              313           0             0
Message                                549           0             0
MessageNotUnderstood                   173           0             0
MethodContext                         1242          46           504     0.1
MethodReference                        554           0             0
ProtoObject                            840           0             0
ReadOnlyVariableBinding                238         144          2304     0.5
Scanner                               2806           0             0
StreamingError                           0           0             0
SystemDictionary                     10788           1            20
SystemOrganizer                          0           1            28
Time                                  1278           0             0
ZeroDivide                             115           0             0