19261926: 264 births, rank #420
1927: 221 births, rank #469
1928: 177 births, rank #520
1929: 212 births, rank #452
1930: 203 births, rank #472
19311931: 181 births, rank #475
1932: 165 births, rank #507
1933: 151 births, rank #518
1934: 154 births, rank #522
1935: 139 births, rank #546
19361936: 130 births, rank #579
1937: 120 births, rank #616
1938: 103 births, rank #678
1939: 110 births, rank #650
1940: 85 births, rank #753
19411941: 85 births, rank #783
1942: 71 births, rank #928
1943: 87 births, rank #833
1944: 69 births, rank #928
19451945: 69 births, rank #905
Dortha rose from #928 to #905 for girls between 1944 and 1945. Its highest annual birth count came in 1921, with 295 births.