Interesting that you, who lives in England, would cite statistics for the US.  But if you researched a little more, you would have found that US attendance at Mass began to slip well before Vatican II, and that was true of Europe (including Great Britain) as well.  The vocation crisis was occurring before the Council as well, and even noted by a bishop from Italy who wanted the Council to proclaim that all Catholics should produce more children so there would be more boys who would become priests!  The problems (or, it can be seen as, growth) you are so distressed about have their origins long, long before the 1960's.  Good analysis of statistics always helps to put the hard data in to context.  Just one example of where you do not is all of the declines in the sacraments and ordinations you mention also having some roots in things like population decline.  It is the examination of the wider picture that gives us the accuracy of our views, don't you agree?