3 ms·
The trend is pretty consistently between 3-6% since the early 1970s. When you start looking earlier than 1970, it was much higher due to Vietnam and WWII.
by long_time_gone 5y ago
The trend is pretty consistently between 3-6% since the early 1970s. When you start looking earlier than 1970, it was much higher due to Vietnam and WWII.