When we write vectors as matrices, we tend to write an $n$-dimensional vector vector as $n \times 1$ column matrix. We emphasize that the gradient vector is defined only for scalar-valued functions. For vector valued functions, we will stick with viewing the derivative as a matrix.
Gloomy Addiction Relapse Statistics. Drug and alcohol rehab statistics show that the percentage of people who will relapse after a period recovery ranges from 50% to 90%. This is a frightening statistic and it is often used as justification for those who wish to carry on with their addiction.
Uninsured Motorists: In 2015, 13.0 percent of motorists, or about one in eight drivers, were uninsured, according to a 2017 study (latest data available) by the Insurance Research Council (IRC). The percentage has been rising since it hit a record low of 12.3 in 2010.