Psychiatric treatments have changed over the past several decades. Attachment is the bonding that promotes relationships lasting for many years and even decades. National census results in the past few decades have been disputed. Their paper formed the basis for further study over the past three decades. The movement continued throughout the next decades. Welfare systems continued to develop over the following decades. This Senate seat was unfavorable to incumbents over the past several decades. Highways have been built and expanded in the last four decades. The campus expanded over the next several decades. This modality emerged in the last two decades. This continued for the next four decades. There has been much interest in learning modalities and styles over the last two decades. Over 3,600 deaths resulted over the subsequent three decades of conflict. He's been married for several decades. During the last few decades it was selective.