They follow the psychoanalytic approach
        
             
        
        
        
8 in 1816 & 1820
16 in 1824 & 1828
21 in 1832, 1836 & 1840
23 from 1844 through 1860
21 in 1864 & 1868
22 in 1872, 1876 & 1880
23 from 1884 through 1908
24 from 1912 through 1928
26 in 1932, 1936 & 1940
26 in 1964 & 1968
25 in 1972, 1976 & 1980
23 in 1984 & 1988
21 in 1992, 1996 & 2000
20 in 2004 & 2008
18 in 2012, 2016 & 2020
25 from 1944 through 1960
 
        
             
        
        
        
Answer:
The answer is: <u>calcite</u>
Explanation:
Caliche is a natural hardened cement, which is composed of calcium carbonate. It is a layer of soil which binds the other soil materials like sand, gravel, silt and clay together. 
Caliche is naturally formed in desert soil after rainstorms. During precipitation, the calcium dissolved in rain water is added to the desert soil, which then combines with the dissolved carbon dioxide in the soil water to form insoluble calcium carbonate, known as calcite. 
 
        
             
        
        
        
Eastern Europe wanted to be independent from the Soviet Union, but did not feel strong to oppose Soviet Union: only upon its collapse could they really become independent. 
And Soviet Union did not support religion: so religious groups could function more in the open after the collapse of the Soviet Union.