In Manufacturing, in 2010, only about 30% are working in manufacturing. That number will continue to decline. However, the total output in farming is higher than it has ever been. The total output in manufacturing is only a little below where it's high was, and is climbing. Yes, a lot of jobs have moved in manufacturing to other countries, but more of them have been eliminated by using different manufacturing techniques. That trend is only going to continue. The next generation of factories will only need about 2/3 as many workers.
This will free up the economy to use the extra workers in doing things that cannot be done today, but, doing that will take time. That's just as it was in the past, too.