For example, nonresponse rates have been steadily increasing, even in high-quality, expensive surveys (figure 3.5) (National Research Council 2013; B. D. Meyer, Mok, and Sullivan 2015).
उदाहरणका लागि, गैर-प्रवृति दरहरू लगातार बढ्दै जान्छन्, उच्च-गुणस्तर, महंगी सर्वेक्षणमा पनि (चित्र 3.5) (National Research Council 2013; BD Meyer, Mok, and Sullivan 2015) ।