Left-handed people make up 11.11 percent of the population.
A child born to a mother under age 30 has an 11 percent chance of being left-handed, but if the mother is over 40, there is a 20 percent chance the child will be left-handed.
According to an article in The Wall Street Journal, left-handed people earn ten percent less than right-handers.
And that’s not the worst thing. According to the New York Times (https://www.nytimes.com/1991/04/04/us/being-left-handed-may-be-dangerous-to-life-study-says.html), southpaws die younger. In one study of Californian deaths, the average right-hander died at age 75, while the left-hander died at age 66.
In another study, 15 out of a thousand right-handed people died from accidents, while 79 out of a thousand left-handers died in accidents.