Segments
We operate through three reportable segments: Transportation Solutions, Industrial Solutions, and Communications Solutions. We believe our segments serve a combined market of approximately $190 billion.
Our net sales by segment as a percentage of our total net sales were as follows:
Below is a description of our reportable segments and the primary products, markets, and competitors of each segment.
Transportation Solutions The Transportation Solutions segment is a leader in connectivity and sensor technologies. The primary products sold by the Transportation Solutions segment include terminals and connector systems and components, sensors, antennas, relays, application tooling, and wire and heat shrink tubing. The Transportation Solutions segment’s products, which must withstand harsh conditions, are used in the following end markets:
• Automotive (73% of segment’s net sales)—We are one of the leading providers of advanced automobile connectivity solutions. The automotive industry uses our products in automotive technologies for body and chassis systems, convenience applications, driver information, infotainment solutions, miniaturization solutions, motor and powertrain applications, and safety and security systems. Hybrid and electronic mobility solutions include in-vehicle technologies, battery technologies, and charging solutions.
• Commercial transportation (15% of segment’s net sales)—We deliver reliable connectivity products designed to withstand harsh environmental conditions for on- and off-highway vehicles and recreational transportation, including heavy trucks, construction, agriculture, buses, and other vehicles.
• Sensors (12% of segment’s net sales)—We offer a portfolio of intelligent, efficient, and high-performing sensor solutions that are used by customers across multiple industries, including automotive, industrial equipment, commercial transportation, medical solutions, aerospace and defense, and consumer applications.
The Transportation Solutions segment’s major competitors include Yazaki, Aptiv, Sumitomo, Sensata, Honeywell, Molex, and Amphenol.
Industrial Solutions The Industrial Solutions segment is a leading supplier of products that connect and distribute power, data, and signals. The primary products sold by the Industrial Solutions segment include terminals and connector systems and components, heat shrink tubing, relays, and wire and cable. The Industrial Solutions segment’s products are used in the following end markets:
• Industrial equipment (49% of segment’s net sales)—Our products are used in factory automation and process control systems such as industrial controls, robotics, human machine interface, industrial communication, and power distribution. Our intelligent building products are used to connect lighting, HVAC, elevators/escalators, and security. Our rail products are used in high-speed trains, metros, light rail vehicles, locomotives, and signaling switching equipment. Our products are also used by the solar industry. The medical industry uses our products in imaging, diagnostic, surgical, and minimally invasive interventional applications.
• Aerospace, defense, oil, and gas (33% of segment’s net sales)—We design, develop, and manufacture a comprehensive portfolio of critical electronic components and systems for the harsh operating conditions of the aerospace, defense, and marine industries. Our products and systems are designed and manufactured to operate effectively in harsh conditions ranging from the depths of the ocean to the far reaches of space.
• Energy (18% of segment’s net sales)—Our products are used by OEMs and utility companies in the electrical power industry and include a wide range of solutions for the electrical power generation, transmission, distribution, and industrial markets.
The Industrial Solutions segment competes primarily against Amphenol, Belden, Hubbell, Carlisle Companies, 3M, Integer Holdings, Esterline, Molex, and Phoenix Contact.
Communications Solutions The Communications Solutions segment is a leading supplier of electronic components for the data and devices and the appliances markets. The primary products sold by the Communications Solutions segment include terminals and connector systems and components, relays, heat shrink tubing, and antennas. The Communications Solutions segment’s products are used in the following end markets:
• Data and devices (59% of segment’s net sales)—We deliver products and solutions that are used in a variety of equipment architectures within the networking equipment, data center equipment, and wireless infrastructure industries. Additionally, we deliver a range of connectivity solutions for the Internet of Things, smartphones, tablet computers, notebooks, and virtual reality applications to help our customers meet their current challenges and future innovations.
• Appliances (41% of segment’s net sales)—We provide solutions to meet the daily demands of home appliances. Our products are used in many household appliances, including washers, dryers, refrigerators, air conditioners, dishwashers, cooking appliances, water heaters, air purifiers, floor care devices, and microwaves. Our expansive range of standard products is supplemented by an array of custom-designed solutions.
The Communications Solutions segment’s major competitors include Amphenol, Molex, JST, and Korea Electric Terminal (KET).
Table:
 |  | Fiscal | 
 | 2019 | 2018 | 2017
Transportation Solutions | 58 % | 59 % | 58 %
Industrial Solutions | 30 | 28 | 29
Communications Solutions | 12 | 13 | 13
Total | 100 % | 100 % | 100 %


Question: In which year was the percentage of industrial solutions the lowest in?
Answer: 2018
Calculation: 28%<29%<30%