the graph below show information about the hotel staff from 1975 to 2010

The table illustrates data on specific categories of hotel employees over a 35-year span between 1975 and 2012, expressed as percentages.

Overall

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,

while

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the staff possessing language qualifications and those proficient in two or more languages displayed an upward trajectory, personnel with work experience exhibited a downward trend.

To begin

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with, in 1975, the lowest proportion was observed among staff members, at just 5%. After fluctuating over the years, the figure peaked at 22% in the year 200, before ending at 20 in the final year.

Conversely

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,

although

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bilingual and multilingual workers accounted for only 10% at the start, ranking

second,

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this

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group experienced a sharp ascent, eventually surpassing all others with 79%, thereby emerging as the most considerable attribute for employers.

In contrast

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, at the outset, whilst the predominant criterion was documented to prior experience with 75%, it underwent substantial oscillation, hitting the trough at 45% in 2005.

However

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, a marked recovery was seen for the latter class, climbing sharply to 67% by the termination year.