Supplies of black market tobacco in New Zealand have increased slightly but are still at low levels.
And sales of legal tobacco shrank by 23 per cent from 2009 to 2013, say researchers from Action on Smoking and Health.
They estimate, based on customs contraband data and calculations on the proportion of smuggling that goes undetected, that illicit tobacco comprised 1.8 to 3.9 per cent of the total tobacco market in 2013.
That is up from the Ash estimate of 0.7 to 2 per cent in 2010. That was the year when the Government boosted the excise tax on cigarettes by 10 per cent and on loose tobacco by 24 per cent and embarked on annual increases of 10 per cent on both until next year.
The average price of a packet of 20 cigarettes is expected to exceed $20 next year. Price rises are the Government's key method of reaching its 2025 "smokefree" goal.