Thus in two years the gold holdings were increased by $1,089,000,000. In 1916 the import of gold exceeded the export by $403,760,000, bride sex and in 1919 by $685,255,000. 1915); Central Electric Light and Power Stations and Street and Electric Railways 1912 (1915); Telephones and Telegraphs, 1912 (1915); Transportation by Water, 1916 (1920). The Bureau of the Census has also printed a collection of volumes on Financial Statistics of Cities and on Financial Statistics of States and continues the annual compilation on Mortality Statistics, begun in 1900. Because the registration space is constantly enlarged, these latter statistics are of increasing value. The average tons per freight practice elevated from 380 to 597. In 1917 1,264 million tons of freight (excluding duplications) were moved by the railways as in opposition to 968 thousands and thousands in 1910.