Statistics on Adoption in the United States

I see you guys are keen on articles on this forum, and since I have not much better to do I started looking on the internet for something to share here.

I found this article and I know it dates from 1993, but I wonder how much has changed since then, have any recommendations been followed up?

Abstract

Adoption is a topic of crucial importance both to those directly involved and to society. Yet, at this writing, the federal government collects no comprehensive national statistics on adoption. The purpose of this article is to address what we do know, what we do not know, and what we need to know about the statistics on adoption. The article provides an overview of adoption and describes data available regarding adoption arrangements and the characteristics of parents who relinquish children, of children who are adopted or in substitute care, and of adults who seek to adopt. Recommendations for future data collection are offered, including the establishment of a national data collection system for adoption statistics.