In the Great Awakening in 1740-42, it is reckoned that 50,000 were added to the churches of New England, and about 300,000 across all thirteen colonies. In what we now call the "forgotten revival" between the years 1790 and 1840, 1,500,000 people were gathered into chapels in England and Wales alone. That constituted one out of every ten people in the country being converted. In the revival in 1859, around 100,000 were added to the churches in Ulster and 50,000 to the churches in Wales. It is estimated that in the 1859 revival in the USA over 2,000,000 were added to the churches.
Errol Hulse, Give Him No Rest