From Diagram 1 it can be seen that, in 1969, 60 per cent of people in Britain owned refrigerators and fridge-freezers. Meanwhile, the largest number of households (91 per cent) had access to televisions. Since you are only comparing two sets of figures, "a larger percentage" would be better.
There was a small increase in both the percentage of households with refrigerators and fridge-freezers, and television, from 1979 to 1996. As a result, almost all of households in Britain (99 per cent) had refrigerators and fridge-freezers and television percentage result, by 1996 almost
Otherwise it looks fine.