NTSC Yearly Data

According to our yearly data gathered from the NTSC, there are a couple of interesting trends that show up. The first batch of images show tables and graphs of the number of vehicles compared to the number of injuries and fatalities.
Source: Chart by AIP Foundation, Data collected by Vietnam NTSC
Source: Chart by AIP Foundation, Data collected by Vietnam NTSC
Source: Chart by AIP Foundation, Data collected by Vietnam NTSC

Source: Chart by AIP Foundation, Data collected by Vietnam NTSC

From the data we can see that from 1999-2002, the number of fatalities and injuries increased at virtually the same rate as the increase in motorbikes.  This is to be expected.  However, starting in 2003 the number of injuries plummet, while the number of fatalities stagnate and increase only moderately.  In 2003 the government changed its definition of what a fatality and injury was, and we can see how that impacted data collection.

Source: Chart by AIP Foundation, Data collected by Vietnam NTSC

The first four data points and the blue linear regression line are from 1999-2002, there is a clear positive relationship between the number of vehicles registered and the number of fatalities.  However, after the government modified the definition of fatality, fatalities increase only moderately and the relationship is less clear.

Source: Chart by AIP Foundation, Data collected by Vietnam NTSC

The same relationship is clear among the number of injuries.  From 1999, injuries and vehicle registration increase with little variance from the regression mean.  Starting in 2003, injuries drop substantially.  

NTSC Yearly Data