Well, there was a gallup poll taken a couple of years ago that said only 29% of Catholics believe in the real presence.
Also here’s an excert from Fr. Hardon concerning this:
The Crisis of Today by Fr. John A. Hardon, S.J.
Four Centuries after the Council of Trent the Church is now in another crisis of Eucharistic faith and specifically of faith in the Real Presence. Palpable evidence of such a crisis is seen in the practical disappearance in not a few dioceses of the Forty Hours Devotion; the corresponding disappearance of Benediction of the Blessed Sacrament; the complete revision of constitutions of once flourishing contemplative institutes that specialized in worship of the Blessed Sacrament exposed on the altar, the widespread neglect of showing any of the customary signs of reverence to Christ’s Real Presence in the tabernacle; the removal of the tabernacle in churches to some obscure and unobtrusive place where the Real Presence is isolated from even possible devotion by the faithful; the mounting literature in still nominally Catholic circles that seldom touches on the Real Presence or that explains it in a way congenial to Protestants who do not believe in Christ’s corporeal presence in the Eucharist, but totally incompatible with the historic faith of Catholicism; the dissemination of religious education textbooks, teacher’s manuals, and study guides that may make an apologetic mention of the physical presence of Christ in the Blessed Sacrament but leave a distinct impression that this presence is peripheral to Catholic faith and practice and is certainly not a cardinal mystery of the Church founded by Jesus Christ.
Although seldom adverted to, part of the same crisis about the Real Presence is the contemporary desacramentalization of the Catholic priesthood. Priests are said to be essentially preachers of the word or ministers of the Gospel or organizers of Christian communities, or spokesmen of the poor or defenders of the oppressed or social leaders or political catalysts or academic scholars or theological appraisers of the faith of believers.
So they are. But is that all? And is that the primary purpose of the Catholic priesthood? No. The primary meaning of the priesthood is its relationship to the Eucharist - as Reality, as Sacrament and Sacrifice. And among these three primarily as Reality, made possible by priestly consecration.
Once again as in previous ages the Church’s magisterium has reaffirmed the Real Presence but in accents and with nuances that were not called for in previous times.
Pope Paul VI in Mysterium Fidei was concerned about those who in spoken and written word “spread abroad opinions which disturb the faithful and fill their minds with no little confusion about matters of faith.”
Among these opinions was and is the theory that so redefines the meaning of the Eucharistic Presence as to obscure, if not deny, the fact of the Eucharistic Reality. It is as though someone said “I believe in the Eucharistic Presence but not as Reality, or as Reality which is only presence and not objective actuality.”