The House of Reps has remained almost wholly unchanged since 1930, except for a period when Alaska and Hawaii were allowed a minimum of 2 reps as they entered the union.
As the population grows the ratio of rep to people expands, it's obviously at its highest ever and will continue at that pace barring expansion or substantial depopulation (which some radical LibDerps hope for, not them of course)
Or . . . the break up of the United States which some LibDerp residents on this board hope for.