The retail industry has seen significant growth in e-commerce sales and non-store retailers over the past 15 years. E-commerce sales have increased from 0.9% of total retail sales in 2000 to 5.2% in 2012, with average annual growth rates of over 20% per year from 2000 to 2011. Over the same period, non-store retailers have grown their share of total retail sales from 6.0% to 9.4%. Grocery stores employ the most retail workers at 830,750, with cashiers making up almost one third of grocery store employees. The median hourly wage for all retail workers is $9.12, equivalent to an annual salary of $18,960.