According to IDC, companies are ramping up their IoT investments rapidly, which can be seen in seven major industries with high levels of physical products or assets. Overall, the market research firm forecasts that IoT spending will increase 19% on average through 2018. Some industries, such as discrete manufacturing, have already invested significantly; others, such as healthcare, have spent less to date but are expected to expand quickly in the future.
Source: How Quickly Are Industries Adopting the Internet of Things?