These charts show manufacturing output by sector over time, and give a total gross value for each 12-month period. Underlying the shifts in sectoral size are major industrial developments. Wood products and processing, for example, provided a great deal of New Zealand's building materials in 1885–86. In 1965–66 pulp and paper manufacture had become a significant industry. A similar development explains the considerable growth in the chemical, petroleum and rubber processing sector between 1925–26 and 1965–66. With the opening of the Marsden Point oil refinery in 1964, manufacture of refined petroleum products began in New Zealand.
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