In 2018, the percentage of S&P 500 sales from foreign countries decreased, after slightly increasing last year, and declining the prior two years. The overall rate for 2018 was 42.90%, down from 2017’s 43.62% and 2016’s 43.16%. The recent high mark was 2014’s 47.82%, and the recent low mark was 2003’s 41.84%. S&P 500…