THE CAUSES OF THE DECLINING BIRTH RATE 151 
Ages at Marriage of Workmen in York 
Age when Married Percentage of Marriages among Workers 
Skilled Unskilled 
Under 20s 000546aaebe4 2S 4.2 
2ON22 Xess dues Senos 18.2 27.7 
22 Oe 6s) an de eRaiaes 30.0 26.5 
2O=3One:, ce accnemes 27.8 23.5 
SIRBG sad chat coehs 9.8 8.1 
SOTAGn aiid tee oR ane 3.0 4.5 
AlAs cores ne en : 4.6 I.4 
OAS 0% cose MG rack 2.4 I.4 
OVER $0 isaccan ce eas node 3.7 2.7 
That the fertility of different classes is not caused entirely by 
the greater duration of marriage of the people who marry at an 
earlier age is indicated by the English statistics on the fecundity 
of marriages of different durations in the different groups. Mar- 
riages of a given degree of duration from two years up to thirty 
show uniformly a much higher fertility among the laborers than 
among the professional classes. 
Fecundity According to Duration of Marriage of Followers of Different 
Occupations 
(British Census of tg1r) 
All dura- |9-p apne: gee gis) 5-10 | 10-15 | 15-20 | 20-25 | 25-30 
tions yrs. yrs. yrs. yrs. yrs. 
= = Ey 2 = = 2 Sy 
eg) ABS el IB [i eB ios (ail MiB ls [oes Le es 
ST ESS SES ESS (SEIS iEiE18 
BY HR INIA IR IAIN IAIN ID IN JAI IAIN 
©} 100 . O| 100] 100} 100] 100} L900] 100} 100) 100/100] 100] 100] 190] 100/100 
. 4120. 2}128)126|120)116|124}118]128]112/130/123 |126)120|120|116 
4\LIQ. 6/123/124 |115|113)115|II9|114|119|115|122|LIO|11g |105/115 
1/107 . 3)I10]108 |108/107|110|108]110}107|111| 108 |110]107 |116|107 
-§|109.1] 95] 98|107]112|108|115/101|110] 98]107| 94/104] 85] 97 
-3| 98.7! 97] 99] 97] 99] 95] 98] 95] 98) 95] 99] 95}/100] 98]100 
-9| 86.7! 95] ox] 86] 83} 89] 84] 92] 86) 93] 87] 97] 91] 96] 96 
-2| 76.9] 83] 80} 80] 78] 77| 73] 79! 75] 84] 79] 85] 8x} 89] 81 
Nonconformist ministers. ..| 79-8] 85.0] 68} 71] 92] 97| 81] 85] 79] 85] 76] 82] 79] 84] 92] 92 
Clergymen (C. of E.)......] 72-0] 82-0] 72! 75} 87] 93] 84) 93] 73} 83] 67] 75} 58] 67| 63) 7x 
Teachersi., nc scasdsc coe 79.3) 76.1) 68] 70] 75] 79] 74} 80] 70] 76) 68) 74} 66] 73] 74] 80 
Doctoreiscriai dave corse iiewe ine 64.7| 72.1] 85] 90] 83] 89] 78) 84] 64] 72} 57] 64] 52] 60] 56] so 
