Total coal production in New Zealand

1878–2021, megatonnes

The following information applies to all values in the table. Fuel type: Coal, Measure: Supply, Activity: Production, Rank: Total, Mining method: Total
Year	Tonnes
1878	164,821
1879	234,928
1880	304,736
1881	342,674
1882	384,342
1883	428,532
1884	488,547
1885	519,265
1886	542,928
1887	567,584
1888	623,238
1889	595,856
1890	647,626
1891	679,525
1892	684,119
1893	702,645
1894	731,092
1895	752,765
1896	805,573
1897	867,764
1898	921,588
1899	990,884
1900	1,111,545
1901	1,259,560
1902	1,386,880
1903	1,443,019
1904	1,562,516
1905	1,611,508
1906	1,757,290
1907	1,860,391
1908	1,890,838
1909	1,941,917
1910	2,232,623
1911	2,099,228
1912	2,212,558
1913	1,918,303
1914	2,312,109
1915	2,244,065
1916	2,293,355
1917	2,101,610
1918	2,066,894
1919	1,877,500
1920	1,873,198
1921	1,838,126
1922	1,887,632
1923	2,001,444
1924	2,116,579
1925	2,148,935
1926	2,275,944
1927	2,404,719
1928	2,475,856
1929	2,576,557
1930	2,582,885
1931	2,192,280
1932	1,871,580
1933	1,850,483
1934	2,093,376
1935	2,149,126
1936	2,174,561
1937	2,314,351
1938	2,257,746
1939	2,380,232
1940	2,556,475
1941	2,681,863
1942	2,723,048
1943	2,832,605
1944	2,850,998
1945	2,878,913
1946	2,838,571
1947	2,795,752
1948	2,820,431
1949	2,858,420
1950	2,712,287
1951	2,474,588
1952	2,793,935
1953	2,559,132
1954	2,635,886
1955	2,597,559
1956	2,669,883
1957	2,654,386
1958	2,763,682
1959	2,854,679
1960	3,060,378
1961	2,971,658
1962	2,591,119
1963	2,786,419
1964	2,923,139
1965	2,701,704
1966	2,636,164
1967	2,407,243
1968	2,260,266
1969	2,363,942
1970	2,386,145
1971	2,124,240
1972	2,181,354
1973	2,468,542
1974	2,564,317
1975	2,412,393
1976	2,486,904
1977	2,368,909
1978	2,182,501
1979	1,947,599
1980	2,162,643
1981	2,196,894
1982	2,244,384
1983	2,473,531
1984	2,526,647
1985	2,390,010
1986	2,517,947
1987	2,220,996
1988	2,438,071
1989	2,713,016
1990	2,578,560
1991	2,689,025
1992	3,018,059
1993	3,336,808
1994	3,033,235
1995	3,576,821
1996	3,610,552
1997	3,567,412.07
1998	3,126,370
1999	3,505,730
2000	3,457,417
2001	3,911,396
2002	4,458,939
2003	5,179,891
2004	5,155,394
2005	5,267,161
2006	5,673,531
2007	4,834,779
2008	4,831,607
2009	4,513,225.767
2010	5,341,909.16
2011	4,958,983
2012	4,922,171.88
2013	4,625,462.98
2014	3,984,447.22
2015	3,390,648
2016	2,866,622
2017	2,918,563
2018	3,230,798
2019	3,033,983
2020	2,818,682
2021	2,867,610.285

Definitions

Coal supply: production of coal plus imported coal, minus exported coal and stock change.
Energy transformation: the conversion of primary energy to more useful forms of energy. It includes activities such as electricity generation, oil refining, and other transformation (including coal used for steel manufacturing) as well as losses.
Consumer energy demand: includes all energy used by final consumers. It does not include energy transformation.

FIELDS
Information about coalfields in New Zealand can be found here: http://www.nzpam.govt.nz/cms/investors/our-resource-potential/minerals/coal/operating-coal-mines

RANK
Bituminous coal (black coal): a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but of poorer quality than anthracite.
Sub-bituminous coal: a type of coal whose properties range from those of lignite to those of bituminous coal and are used primarily as fuel for steam-electric power generation.
Lignite (brown coal): a soft brown combustible sedimentary rock formed from naturally compressed peat. It is considered the lowest rank of coal due to its relatively low heat content.

MINING METHOD
Opencast: Open-pit mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.
Underground: Sub-surface mining consists of digging tunnels or shafts into the earth to reach buried ore deposits.