By 1960, one-sixth of working Americans were employed directly or indirectly by the industry, but as automation and imports eroded the need for such a large workforce within a couple of decades.
One-sixth of working Americans were employed directly or indirectly by the industry. This was by 1960. One-sixth of working Americans as automation and imports eroded the need for such a large workforce within a couple of decades. This was by 1960.