1911 Census of England and Wales, General Report with Appendices, Table 15: " Ratio of the Proportional Number enumerated at each Age in former Censuses to the corresponding number in 1911 taken as 100".

Ages. 1881. 1891. 1901. Ages. 1881. 1891. 1901.
Under 5 years 127 115 107 45       "        50 83 86 91
5 and under 10 118 114 105 50       "        55 89 90 92
10       "        15 111 115 106 55       "        60 88 86 91
15       "        20 106 110 108 60       "        65 99 94 97
20       "        25 102 104 109 65       "        70 86 88 87
25       "        30 92 95 102 70       "        75 88 94 89
30       "        35 84 88 94 75       "        80 91 94 95
35       "        40 82 85 91 80       "        85 92 91 99
40       "        45 87 86 92 85 and upwards 83 85 84