All Aboard! 20th Century American Trains which contained four sets of the five paintings. All Aboard! 20th Century American Trains In August 1999, the United States Postal Service issued a set of 33¢ postage stamps entitled All Aboard! 20th Century American Trains to ""pay tribute to American industry and design, and specifically to the heritage of our railroads."" Artist Ted Rose created five watercolor images depicting the following celebrated American named passenger trains from the 1930s and 1940s: Descriptive text regarding each of the trains was listed on the gummed side of each stamp. At the same time, the USPS offered for sale a booklet of
Death rates in the 20th century the 20th century. A natural population increase occurs when birth rates are higher than death rates. Recently and most notably, the years immediately after World War II saw an explosion in fertility rates called the Baby Boom because the returning soldiers and displaced people started new families. Death rates were significantly lower during the baby boom and thus populations increased substantially. Today these baby boomers are approaching old age and driving up the average age of the overall population. The World Bank predicts a dramatic decrease in population size from the increase in death rates over the next decade or