The vatican says that the number of priests around the world is slowly but steadily rising . In its yearbook of statistics presented to pope benedict today , the holy see says the number of priests has gone up by several hundred each year since 2000 after two decades of decline .
For instance a 30-year long study published in the journal of personality and social psychology found that women who displayed the duchenne smile in their college yearbook photos had greater levels of well-being and marital satisfaction three decades later .