Many small U.S. companies closed down their pension plans in the 1980s. Statistics for the three years 1980, 1985, and 1987 show that a total of 187,000 U.S. companies closed down their pension plans during those three years. Of the three, 1985 was the year with the most pension plan closures: in that year only 15,000 fewer companies closed down their pension plans than in 1980 and 1987 combined. Of the three, 1980 was the year with the least number of pension plan closures: in that year 45,000 fewer companies closed down their pension plans than in 1987. How many companies closed down their pension plans in each of those three years?