How to count how much times a number appears in a column ignoring the row context?

[gluizqueiroz]

I have the following real table.

StartValue	EndValue	Percentage	NumberToCount
1980	2010	0,554893	10
1981	2011	0,145216	10
1982	2012	0,113458	10
1983	2013	0,118518	11
1984	2014	0,948498	11
1985	2015	0,543353	12
1986	2016	0,273374	13
1987	2017	0,239495	14
1988	2018	0,345646	14
1989	2019	0,454435	15

I need to create a calculated column that counts how much times a number appears in the column "NumberToCount", like the following result:

StartValue	EndValue	Percentage	Number	CountNumbers
1980	2010	0,554893	10	3
1981	2011	0,145216	10	3
1982	2012	0,113458	10	3
1983	2013	0,118518	11	2
1984	2014	0,948498	11	2
1985	2015	0,543353	12	1
1986	2016	0,273374	13	1
1987	2017	0,239495	14	2
1988	2018	0,345646	14	2
1989	2019	0,454435	15	1

It can't be a measure, because I need to create a calculated column.

[Greg_Deckler]

Should be something like:

CountNumbers = 
VAR __NumberToCount = [NumberToCount]
RETURN
COUNTROWS(
  FILTER(ALL('Table'),[NumberToCount] = __NumberToCount)
)

[gluizqueiroz]

Hey @Greg_Deckler .

Thanks for answering me. Your solutions really works, but not in my case.
I didn't mentioned on my question how I create a table because I think it can be more difficult to understand my question, but, let me tell you.

I have been creating my table using variables and ALL and FILTER and ADDCOLUMNS, I have learned this strategy by reading your answers here, on Power BI Forum.

So, my table has the following code, for example:

Table = 
VAR __table1 = ALL(BI_Installments[YearSold]; BI_Installments[YearExpiry]; BI_Installments[Sold-Expiry])
VAR __table2 = ADDCOLUMNS(__table1; "%VI"; [% Value Installments])
VAR __table3 = FILTER(__table2; AND([Sold-Expiry] > 0; [%VI] > 0))

VAR __table32 = ADDCOLUMNS(__table3; "AuxCount"; ----- INSERT THE COUNT HERE -----)
VAR __table33 = FILTER(__table32; AuxCount > 1)

VAR __table4 = GROUPBY(__table3; [Sold-Expiry]; "%FinalVI"; AVERAGEX(CURRENTGROUP(); [%VI]))
VAR __table5 = SELECTCOLUMNS(__table4; "Total"; DIVIDE([%FinalVI]; 1; 0))
RETURN
__table5

I think you will understand this type of creating a table using DAX (in the future, I will transform this in a measure).
Following you answer, I can't use:

VAR __NumberToCount = [NumberToCount]

In my case:

VAR __NumberToCount = [Sold-Expiry]