Well,
ICBM = InterContinental Ballistic Missile. ie it is designed to cross water to another continent to strike at a target. there are very few continents and nuke users on each continent. the principle antagonists are typically seen as the cold war club. US, USSR and China had to send rockets over 8000miles to strike at a target. China has only recently joined the ICBM club - and thats only against the US West Coast
I don't know ecxacly what is ICBM, but you don't really think that we have nuclear warheads without any way of droping them, right?
The US disabled the way to do it with our AC's, how else can we do that?
I don't know ecxacly if those rockets are ballistic or not, but i saw not once an israeli rocket who can take a nuclear warhead.
About the amount, in the earliy 80's according to a short movie i saw we had almost 300 nuclear bomb, not to mention the Termo atomic bombs, as the movie said ( There was a picture of an round ball, silver, cut to half ) " A model of an Israeli Termo atomic bomb, stronger 10 times or more than the bomb that fell on Hiroshima" ( it was said in Hebrew so i don't know how to ecxacly transalate it ) ( and this short movie was published, so its not a secret anymore what so ever :<> )
PS, if someone wants the movie ( Simulation about Dimona nuclear reactor with english subtitles ) he can send me a pm. ( ONLY US AND EU \ FRIENDLY COUNTRIES :< )