For example, the average age of the onset of menstrual periods in girls was 15 in 1900. By the 1990s, this average had dropped to 12 and a half years of age.uberty facts. 1  Puberty is the period of sexual maturation and achievement of fertility. 2  The time when puberty begins varies greatly among individuals; however, puberty usually occurs in girls between the ages of 10 and 14 and between the ages of 12 and 16 in boys.
Herbert Hoover was the president of the U.S. when the great depression began in 1929.
By 1932, one of the bleakest years of the Great Depression, at least one-quarter of the American workforce was unemployed. When President Franklin Roosevelt took office in 1933, he acted swiftly to try and stabilize the economy and provide jobs and relief to those who were suffering.