It stands to reason that manufacturing jobs would drop though. That's partly because of automation and increases in efficiency, and also due to the cyclical nature of the industry.
I hunted the original source of that chart:
http://research.stlouisfed.org/publi...Andolfatto.pdf
"But there appear to be clear trends in at least two sectors: Manufacturing sector employment is in longrun decline, while employment in the education and health services sector is steadily on the rise—even through the most recent recession. In terms of cyclicality, there is no surprise. To take two extremes, construction sector employment is highly cyclical, while government sector employment is not. Roughly half of the industries in Figure 2 display employment levels that have leveled off during the past year, while most other industries experienced an increase."
(top of page 139)