What is the trend of the time people spend in the office in recent decades?

Over the twentieth century, work hours declined by almost half, mostly because of rising wages brought about by a renewed economic growth, with a supporting role from trade unions and collective bargaining, and progressive legislation. The workweek, in most of the industrialized world, dropped steadily, to about forty hours after World War II.

Table: trends in average annual hours of work per person [[1]]