The Labor Department revealed on Friday that the United States added 199,000 new jobs in December, falling short of experts' projections of 422,000 new positions.Although the unemployment rate fell to a historic low of 3.9 percent in December, it was the fewest new hiring of any month in 2021.Despite increasing demand for workers, the results imply that firms are still having difficulty attracting new employees due to issues such as a lack of childcare, virus worries, and big stimulus savings.Despite a lower-than-expected decline in unemployment, the labor force participation...