backfire can be caused by choke not shutting off completely, also could have a bad distributor cap, bad spark plugs, bad ignition condensor, bad plug leads, or to much fuel getting to carburetor system Consider getting yourself a service manual as it contains many troubleshooting for your car.
Median age* of the population. Over the past 50 years, the median age of the world's population has increased by a mere three years, from 23.6 in 1950 to 26.4 in 2000. (The median marks the point where half the population is older than that age and half is younger). But over the next 50 years, the median age will jump to 37, according to the latest projections made by the United Nations. By 2050, 17 developed countries are expected to have a median age of 50 or more.
The median age (the age at which half the population is older and half is younger) of the Australian population has increased by 4.0 years over the last two decades, from 33.4 years at 30 June 1994 to 37.3 years at 30 June 2014.Between 30 June 2013 and 30 June 2014 the median age remained steady at 37.3 years.n 2010, the age structure of Australia's population was similar to that of New Zealand and the United States of America. Generally, the European countries and Japan had smaller proportions of children and higher proportions of older people than Australia.