The rise of canephora is read by period, and each stage comes down to a market regime.

• 1919Canephora occupies 84% of the coffee area of the Dutch East Indies. The proportion is overwhelming, but the archipelago hardly weighs against Brazil: on a world scale, it changes almost nothing.
• 1955Coste estimates that arabica still supplies “more than nine tenths” of the world's coffee, with five billion shrubs on four million hectares.
• 1963-1989Over the whole period of the market regulated by the International Coffee Agreement, the ICO gives an average of 72.5% arabica and 27.5% canephora. As long as the quotas hold, the share does not move: in 1990, the last year before their collapse, canephora is still at 27.5%.
• 2013The free market changes everything: 38.9%, or 56.5 million bags out of 145.5. The share hovers around 40% in the 2010s, and Davis's review (2026) places it at about 43% of world trade.
• 2025-26The USDA report of December 18, 2025 gives a world production of 178.848 million bags, of which 95.515 arabica (53.4%) and 83.333 canephora (46.6%). It is a record.
• 2026-27The June 2026 projection raises arabica to 55.8% of 189.667 million bags, which still leaves 44% for canephora.

We are around one half, and we stay there.

Ukers 1922, ch. XXII, p. 371; Coste 1955, p. 22-30; ICO via Daily Coffee News, July 17, 2014; USITC, “Is Robusta on the Rise?”; Kawuki et al. 2026; Davis et al. 2026; USDA, Coffee: World Markets and Trade, December 18, 2025 and June 2026, via LC ch. 1 and Comunicaffe

Three countries make up most of it. Vietnam first: the USDA expects 32.5 million bags in 2026-27, of which 31.4 canephora, a record. Brazil next, with 24.4 million bags of canephora, after a record in 2025-26. Indonesia finally, which has nearly doubled its share since 1990 and weighed 12.7 million bags in 2013.

Sources given line by line; the 1960-1980 decades are known only through the average of the regulated period

Then come Uganda and India, where the reversal can be measured. Indian coffee was 72% arabica in the 1950s; canephora now occupies 48% of the area.

Côte d'Ivoire, for its part, has receded. Long the world's leading canephora producer, it has seen its growers turn to cocoa, rice and rubber. A rank is also lost through arbitrage between crops, and not only through climatic accident.

McCook puts a figure on what this species has contributed: without canephora, born of rust, world coffee production would today be 30 to 40% lower. World volume thus owes part of itself to the epidemic that drove arabica out of the lowlands.

USDA, June 2026, via Daily Coffee News, June 24, 2026, and Comunicaffe; ICO via Daily Coffee News 2014; Kawuki et al. 2026, introduction (ICO 2024); Côte d'Ivoire country profile (pays.json); McCook 2019, p. 202 (digest)