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.
One corrolary to these shifts is that the white population is aging more rapidly than that of other racial groups. The 2010 census indicated that the median age for whites was 42 years. For Asians, it was 35.4. For Hispanics, it was 27.3. And for the population marking âmore than once race,â it was a staggering 19.9. Overall, just 7 percent of the minority population was age 65 or older, while 16 percent of the white population had already reached that milestone.