A comparison of the immigrant peoples with reference to their composition by age shows that the Jewish movement contains without any exception the largest proportion of children.[103] Out of a total of 990,182 Jewish immigrants from 1899 to 1909, 245,787, or 24.8 per cent, were children under fourteen. In this regard, again, the Bohemian and Moravian approach the Jewish, though not as closely as in the proportion of females. The contrast with the South Italians obtains here as well. As the Jewish immigration, during the twelve years from 1899 to 1910, was the second highest in numbers, contributing more than a million to the total, the number of females and children found in its movement was higher than that of any other immigrant race, not only relatively but absolutely as well. Most striking, indeed, is the contrast in these respects between the Jewish immigrants and the other races coming from the countries of Eastern Europe, particularly the Slavic immigrant races with whom the Jews have been associated in the official statistics.[104] An examination of the proportion of females in the immigration of the eight races composing the Slavic group, shows that, with the exception of the Bohemians and Moravians (whose movement presents strong similarities to that of the Jews), the percentage of females was less than a third of the total immigration of each race, the highest being that of the Poles, which was 30.5 per cent. The contrast is even more striking in respect to children under fourteen. Here, again, excluding the Bohemians and Moravians, the highest percentage in the group was that of the Poles, 9.5 per cent. In this respect, therefore, the association of the Jewish immigrants with the other immigrants from Eastern Europe, under the rubric "Slavic races", is seen to be untenable. Strongest of all is the contrast between the Jewish immigration and that of the Roumanian people.[105] The Roumanian movement is seen to be composed practically wholly of individuals, only 9 per cent being females, while that of the people from Roumania (nine-tenths of whom are Jews[106]) is seen to have a proportion of females higher even than that in the total Jewish immigration. Even greater is the contrast with respect to age, only 2.2 per cent of the Roumanians being children under fourteen. The division of the peoples represented in the immigration to the United States into "old" and "new", the former consisting of the peoples from Northern and Western Europe, the latter of the peoples from Southern and Eastern Europe, is a convenient classification essentially of two periods of immigration coinciding largely with changes in the economic conditions in the United States.