1911 Census of England and Wales, General Report with Appendices, Table 97 : " Administrative Counties with the Highest and Lowest Proportions of native-born Inhabitants in their Enumerated Populations".

Highest proportions
of native-born (low
rates of immigration).		 Natives per 1,000
of the enumerated
population of each sex.		 Lowest proportions
of native-born (low
rates of immigration).		 Natives per 1,000
of the enumerated
population of each sex.
Males. Females. Males. Females.
Cornwall 822 840 Berkshire 584 527
Cumberland 803 805 Essex 487 462
Lincolnshire 760 745 Hertfordshire 564 513
Norfolk 825 784 Middlesex 360 322
Suffolk 780 747 Rutlandshire 568 536
Anglesey 827 816 Hampshire 547 567
Cardiganshire 793 818 Surrey 434 379
Carmarthenshire 747 801 Sussex 637 535
Carnarvonshire 768 740 Warwickshire 492 459
Montgomeryshire 797 782 Worcestershire 570 532
Pembrokeshire 769 807 Glamorganshire 551 612