Question: Aggregate Industries is a member of the company that has a presence in how many countries?

Context paragraphs:
Rail-Veyor: Rail-Veyor is a remote controlled, electrically powered light-rail haulage solution for surface and underground applications in the mining and aggregate industries.  Rail-Veyor Technologies Global Inc. is a private Sudbury, Canada-based industrial bulk material handling and material haulage company that manufactures and installs Rail-Veyor systems.

Foster Yeoman: Foster Yeoman Limited, based in the United Kingdom, was one of Europe's largest independent quarrying and asphalt companies, but is now part of Aggregate Industries, owned by the Swiss construction materials conglomerate Holcim.

Election day: Election day refers to the day when general elections are held.  In many countries, general elections are always held on a Sunday, to enable as many voters as possible to participate, while in other countries elections are always held on a weekday.  However, some countries, or regions within a country, always make a weekday election day a public holiday, thus satisfying both demands.  Many countries permit absentee ballots or early ballots to be cast by mail prior to the election, thereby avoiding the problem altogether.

Aggregate Industries: Aggregate Industries, a member of LafargeHolcim, is a company based in the United Kingdom with headquarters at Bardon Hill, Coalville, Leicestershire.  Aggregate Industries manufactures and supplies a range of heavy building materials, primarily aggregates such as stone, asphalt and concrete, to the construction industry and other business sectors.  Aggregate Industries also manufactures and imports cement, and provides a range of aggregate-associated goods and services, these include the manufacture of masonry and reconstructed stone items for construction industry and domestic applications, the manufacture of pre-cast concrete items, the supply of ready mixed concrete, design and project management consulting, and resurfacing contracting services.

Interaction between monetary and fiscal policies: Fiscal policy and monetary policy are the two tools used by the state to achieve its macroeconomic objectives.  While for many countries the main objective of fiscal policy is to increase the aggregate output of the economy, the main objective of the monetary policies is to control the interest and inflation rates.  The IS/LM model is one of the models used to depict the effect of policy interactions on aggregate output and interest rates.  The fiscal policies have a direct impact on the goods market and the monetary policies have a direct impact on the asset markets; since the two markets are connected to each other via the two macrovariables output and interest rates, the policies interact while influencing output and interest rates.

Mendip Rail: Mendip Rail Ltd is an independent freight operating railway company in Great Britain.  It is composed of the rail-operation divisions of Aggregate Industries (formerly Foster Yeoman) and Hanson Aggregates (previously ARC).

ACS Group: ACS, Actividades de Construcción y Servicios, S.A. (] ) is a Spanish company dedicated to civil and engineering construction, all types services and telecommunications.  It is one of the leading construction companies in the world, with projects in many countries around the world.  The company was founded in 1997 through the merger of "OCP Construcciones, S.A." and "Ginés Navarro Construcciones, S.A.".  The group has a global presence, including countries like Germany, India, Brazil, Chile, Morocco and Australia.  The headquarters are in Madrid and the chairman is Florentino Pérez.  Listed on the Bolsa de Madrid, the company's shares form part of the IBEX 35 stock market index.

Sepro Mineral Systems: Sepro Mineral Systems Corp. is a multinational corporation founded in 1987 and headquartered in British Columbia, Canada.  The outcome of the acquisition of Sepro Mineral Processing International by Falcon Concentrators in 2008, the companies' key focus is the production of mineral processing equipment for the mining and aggregate industries.  Sepro Mineral Systems Corp. also provides engineering and process design services while continuing to advance its machine technology through research and development.  Proprietary technology produced by Sepro includes grinding mills, ore scrubbers, vibrating screens, centrifugal gravity concentrators, agglomeration drums, and dense media separators.  The company is also a supplier of single source modular pre-designed and custom designed plants and circuits which are made of Sepro's proprietary equipment as well as third party products.

Dartmoor Railway: The Dartmoor Railway is a 15+1/2 mi long railway line in Devon, England.  From Crediton the line parallels the Tarka Line to the site of the former Coleford Junction.  Heading west, it then serves Sampford Courtenay, Okehampton and Meldon Quarry.  The route from Coleford to Meldon is owned by Aggregate Industries, whilst the Coleford to Crediton section is owned by Network Rail.  In the past freight trains served the ballast quarry at Meldon.  The line is leased to and maintained by the Dartmoor Railway CIC, who operate some services and facilitate access to the line by other operators.

LafargeHolcim: LafargeHolcim is a manufacturer of building materials (primarily cement, aggregates and concrete) which claims to be the largest in the world, with a presence in 90 countries and 115,000 employees.  It was formed by the merger on 10 July 2015 of cement companies Holcim and Lafarge which had combined net sales of CHF 33 billion (EUR 27 billion) in 2014.  The new company has a manufacturing capacity of 368.5 million tons a year.

Supporting paragraphs: Aggregate Industries LafargeHolcim
Answer: 90