Creating jobs and unemployment are influenced by factors such as economic conditions, global competition, education, automation.
A report by the US Bureau of Labor Statistics shows that the unemployment rate in America in 2001 was 4.20% to rise to 8.30% by January 2011. On the other hand, the Statistic Portal - Statista, shows that unemployment in America rose from 4.20% in 2001 to 8.90% in 2011.
If, for example, the country's economic growth rate is 3.5%, this could mean that technological conditions of production have improved, and hence, new workers are not required for the same growth rate.
However, if the growth rate of the economy is 0.5%, it is clear that the supply of the product is higher than market demand, and employers can dismiss workers due to reduced demand on the market.
These two examples show that unemployment can increase due to improved production conditions (there is no need for new workers, there are no layoffs, but new workers come to the labor market), or workers are dismissed due to reduced demand for products.
Therefore, we can say that the growth of unemployment from about 4% to about 8-9% is sharply increased.