The mid-twentieth century was the heyday of Conservative Judaism, and
almost all predictions were for its continued dominance. However, the picture
has shifted dramatically since, and many of the changes reflect broader changes
in American religious patterns. As far as Jewish denominational trends are concerned, the rate of American Jews whose affiliation is Orthodox rose from 6 percent in 1990 to 10 percent in 2001. The rate of American Jews who are synagogue members has not changed dramatically since 1990; in 2001, this figure stood at 44 percent. However, the denominational percentages of the synagogue memberships have changed significantly. From 1990 to 2001, the proportion of Conservative memberships declined from 51 percent to 33.1 percent, while Orthodox and Reform increased from 10 percent to 20.8 percent, and from 35 percent to 38.5 percent, respectively.