The table below shows the number of nuclear weapons owned by 7 different nations in different years.

The data illustrates the amount of nuclear warheads possessed by 7 separate countries in 1965, 1990 and 2005. Overall, the countries that had nuclear weapons in 1965 all had more in 1990 and then decreased their total numbers in 2005. Russia and the United States had by far the most weapons in all three years, whereas Germany and Japan had none in any year. The United States had 378 nuclear weapons in 1965, nearly double its nearest rival, and this increased to 7534 by 1990, however they scaled back their arsenal to 6976 in 2005, but still had nearly twice as many as any other country. Russia had 196 warheads in 1965 and they increased their nuclear capability to 4873 in 1990 before reducing their numbers to just under 4000 in 2005. France, China and the UK all had negligible amounts in 1965 before scaling up to 49, 257 and 235 in 1990 respectively. All of them reduced their nuclear weapons cache in 2005 compared to 1990 by between approximately a sixth and a third.