service of militaristic political factions. Economic factors such as male-majority industries and activities like the petrochemical , agriculture , engineering , military , and technology also have created a male gender imbalance in some areas dependent on one of these industries. Conversely, the entertainment , banking , tourism , fashion , and service industries may have resulted in a female-majority gender imbalance in some areas dependent on them. [ 49 ] One study [ 50 ] found that the male-to-female sex ratio in the German state of Bavaria fell as low as 0.60 after the end of World War II for the most severely affected age cohort (those between 21 and 23 years old in 1946). This same study found that out-of-wedlock births spiked from approximately 10–15% during the inter-war years up to 22% at the end of the war. This increase in out-of-wedlock births was attributed to a change in the marriage market caused by the decline in the sex ratio. The value for the entire world population is 1.01 males/female, with 1.07 at birth, 1.06 for those under 15, 1.02 for those between 15 and 64, and 0.78 for those over 65. [ 3 ] The " First World " G7 members all have a gender ratio in the range of 0.95–0.98 for the total population, of 1.05–1.07 at birth, of 1.05–1.06 for the group below 15, of 1.00–1.04 for the group aged 15–64, and of 0.70–0.75 for those over 65. Countries on the Arabian peninsula tend to