Catholics keep saying that there are 20,000 Protestant denominations. That's just not true!

As of 2007, there are 39000!  And it is projected there will be 55000 by 2025.

Here is the current total number of "Christian denominations" as of 2007 according to the "Global Christianity" pages at Gordon-Conwell, and projected for 2025 if present trends continue:

SOURCE: Global Christianity -- Gordon-Conwell Theological Seminary database

MEMBERSHIP BY 6 ECCLESIASTICAL MEGABLOCS
	1900	1970	mid-2000	mid-2007	2025 projected
Roman Catholics	106,430,000	665,484,000	1,055,498,000	1,142,968,000	1,353,674,000
Independents	96,926,000	377,830,000	437,673,000	602,190,000
Protestants	103,025,000	211,054,000	346,889,000	385,815,000	497,703,000
Orthodox	115,844,000	139,646,000	214,091,000	220,488,000	236,364,000
Anglicans	30,571,000	47,409,000	75,335,000	82,632,000	109,690,000
Marginal Christians	928,000	11,100,000	29,500,000	35,133,000	49,775,000
CHRISTIAN ORGANIZATIONS
Denominations	1,900	18,800	33,800	39,000	55,000
Congregations (worship centers)	400,000	1,450,000	3,448,000	3,826,000	5,000,000

The vast majority of this projected "growth" in denominations are due to Protestants (another 500+ denominations added from 2000 to 2025) and Independents (another 20,000+ denominations added from 2000 to 2025). See Barrett's Encyclopedia, Table 1-5, pages 16-18.

Pretty sad state of affairs.  It certainly isn't what Jesus wanted:

John 17:19 And for their sakes I sanctify myself, that they also might be sanctified through the truth.  20 Neither pray I for these alone, but for them also which shall believe on me through their word;

21 That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.