Types of paywalls implemented in the U.S. 2016

The graph presents the number of newspapers with a digital subscription in the United States as of February 2016, by subscription type. According to the American Press Institute date, 12 newspapers employed the freemium model.该图表展示了截至2016年2月，美国各类数字订阅报纸的数量。根据美国新闻学院的数据，共有12家报纸采用了免费增值模式。