For most of the current century 10% of employment ads mentioned engineering. During the 2008 collapse, this number had been approaching 15% but fell back sharply coinciding with a renewed loss of manufacturing jobs. Since the collapse, there has been a slight recovery in the percentage of job solicitations mentioning engineering. However in mid 2012 that number collapsed again, falling below 10% and reaching levels of pre-2006.
The general trend of the above graph is repeated by plotting individual engineering specialties (electrical, mechanical,chemical), "civil engineering" is relatively stable for now but only because it could not get any worse. Although there has been some recovery in manufacturing jobs, the chart tends to indicate a continued hollowing out of the country's technological base. The decline in percentage of engineering jobs being created lead the overall decline in job creation and may be something of a leading indicator. It highlights the need to grow manufacturing to return the US to economic health.